Product Folder Order Now Support & Community Tools & Software Technical Documents LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 LM2586 4-V to 40-V, 3-A Step-Up Wide VIN Flyback Regulator 1 Features 3 Description * * * * * The LM2586 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3 V, 5 V, 12 V, and adjustable. 1 * * * * * * * * Requires Few External Components Family of Standard Inductors and Transformers NPN Output Switches 3 A, Can Stand Off 65 V Wide Input Voltage Range: 4 V to 40 V Adjustable Switching Frequency: 100 kHz to 200 kHz External Shutdown Capability Draws Less Than 60 A When Shut Down Frequency Synchronization Current-mode Operation for Improved Transient Response, Line Regulation, and Current Limit Internal Soft-start Function Reduces In-rush Current During Start-up Output Transistor Protected by Current Limit, Undervoltage Lockout, and Thermal Shutdown System Output Voltage Tolerance of 4% Maximum Over Line and Load Conditions Create a Custom Design Using the LM2586 With the WEBENCH(R) Power Designer 2 Typical Applications * * * * Flyback Regulator Forward Converter Multiple-output Regulator Simple Boost Regulator Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with these switching regulators. The power switch is a 3-A NPN device that can stand-off 65 V. Protecting the power switch are current and thermal limiting circuits, and an undervoltage lockout circuit. This IC contains an adjustable frequency oscillator that can be programmed up to 200 kHz. The oscillator can also be synchronized with other devices, so that multiple devices can operate at the same switching frequency. Other features include soft start mode to reduce inrush current during start up, and current mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. The device also has a shutdown pin, so that it can be turned off externally. An output voltage tolerance of 4%, within specified input voltages and output load conditions, is ensured for the power supply system. Device Information(1) PART NUMBER LM2586 PACKAGE BODY SIZE (NOM) TO-220 (7) 10.1 mm x 8.89 mm DDPAK /TO-263 (7) 14.986 mm x 10.16 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Block Diagram 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Table of Contents 1 2 3 4 5 6 Features .................................................................. Typical Applications .............................................. Description ............................................................. Revision History..................................................... Pin Configurations................................................. Specifications......................................................... 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7 1 1 1 2 3 4 Absolute Maximum Ratings ..................................... 4 ESD Ratings.............................................................. 4 Recommended Operating Ratings............................ 4 Thermal Information .................................................. 5 Electrical Characteristics: 3.3 V ................................ 5 Electrical Characteristics: 5 V ................................... 6 Electrical Characteristics: 12 V ................................. 7 Electrical Characteristics: Adjustable ........................ 8 Typical Characteristics ............................................ 10 Detailed Description ............................................ 13 7.1 Overview ................................................................. 13 7.2 Functional Block Diagram ....................................... 13 7.3 Feature Description................................................. 13 8 Application and Implementation ........................ 20 8.1 Application Information............................................ 20 8.2 Typical Applications ............................................... 20 8.3 System Examples ................................................... 31 9 Layout ................................................................... 33 9.1 Layout Guidelines ................................................... 33 9.2 Layout Example ...................................................... 33 9.3 Heat Sink/Thermal Considerations ......................... 33 10 Device and Documentation Support ................. 35 10.1 10.2 10.3 10.4 10.5 10.6 Device Support...................................................... Receiving Notification of Documentation Updates Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 35 35 35 35 36 36 11 Mechanical, Packaging, and Orderable Information ........................................................... 36 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision D (April 2013) to Revision E * Editorial changes only, no technical revisions........................................................................................................................ 1 Changes from Revision C (April 2013) to Revision D * 2 Page Page Changed layout of National Semiconductor data sheet to TI format.................................................................................... 34 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 5 Pin Configurations NDZ Package 7-Pin TO-220 Top View, Bent, Staggered Leads KTW Package 7-Pin DDPAK/TO-263 Top View NDZ Package 7-Pin TO-220 Side View; Bent, Staggered Leads KTW Package 7-Pin DDPAK/TO-263 Side View Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 3 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings (1) (2) -0.4V VIN 45V Input Voltage -0.4V VSW 65V Switch Voltage Switch Current (3) Internally Limited Compensation Pin Voltage -0.4V VCOMP 2.4V Feedback Pin Voltage -0.4V VFB 2 VOUT -0.4V VSH 6V ON /OFF Pin Voltage -0.4V VSYNC 2V Sync Pin Voltage Power Dissipation (4) Internally Limited -65C to +150C Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Maximum Junction Temperature (1) (2) (3) (4) 260C (4) 150C If Military/Aerospace specified devices are required, contact the Texas Instruments Sales Office/ Distributors for availability and specifications. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. These ratings apply when the current is limited to less than 1.2 mA for pins 1, 2, 3, and 6. Operating ratings indicate conditions for which the device is intended to be functional, but device parameter specifications may not be ensured under these conditions. For ensured specifications and test conditions, see the Electrical Characteristics. Note that switch current and output current are not identical in a step-up regulator. Output current cannot be internally limited when the LM2586 is used as a step-up regulator. To prevent damage to the switch, the output current must be externally limited to 3A. However, output current is internally limited when the LM2586 is used as a flyback regulator (see the section for more information). The junction temperature of the device (TJ) is a function of the ambient temperature (TA), the junction-to-ambient thermal resistance (JA), and the power dissipation of the device (PD). A thermal shutdown will occur if the temperature exceeds the maximum junction temperature of the device: PD x JA + TA(MAX) TJ(MAX). For a safe thermal design, check that the maximum power dissipated by the device is less than: PD [TJ(MAX) - TA(MAX)]/JA. When calculating the maximum allowable power dissipation, derate the maximum junction temperature--this ensures a margin of safety in the thermal design. 6.2 ESD Ratings V(ESD) (1) Electrostatic discharge (minimum) Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) (C = 100 pF, R = 1.5 k) VALUE UNIT 2000 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Ratings 4V VIN 40V Supply Voltage Output Switch Voltage 0V VSW 60V Output Switch Current ISW 3A Junction Temp. Range -40C TJ +125C 4 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 6.4 Thermal Information LM2585 THERMAL METRIC (1) RJA RJC (1) (2) (3) (4) (5) (6) KTW (DDPAK/TO-263 NDZ (TO-220) 7 PINS 7 PINS 56 (2) 65 (3) 35 (4) 45 (5) 26 (6) -- Junction-to-ambient thermal resistance Junction-to-case thermal resistance 2 2 UNIT C/W C/W For more information about traditional and new thermal metrics, see the Semiconductor and IC package thermal metrics application report. Junction-to-ambient thermal resistance for the 7-lead TO-263 mounted horizontally against a PC board area of 0.136 square inches (the same size as the DDPAK/TO-263 package) of 1 oz. (0.0014 in. thick) copper. Junction-to-ambient thermal resistance (no external heat sink) for the 7-lead TO-220 package mounted vertically, with 1/2 inch leads in a socket, or on a PC board with minimum copper area. Junction-to-ambient thermal resistance for the 7-lead TO-263 mounted horizontally against a PC board area of 0.4896 square inches (3.6 times the area of the DDPAK/TO-263 package) of 1 oz. (0.0014 in. thick) copper. Junction-to-ambient thermal resistance (no external heat sink) for the 7-lead TO-220 package mounted vertically, with 1/2 inch leads soldered to a PC board containing approximately 4 square inches of (1 oz.) copper area surrounding the leads. Junction-to-ambient thermal resistance for the 7-lead TO-263 mounted horizontally against a PC board copper area of 1.0064 square inches (7.4 times the area of the DDPAK/TO-2633 package) of 1 oz. (0.0014 in. thick) copper. Additional copper area reduces thermal resistance further. 6.5 Electrical Characteristics: 3.3 V Specifications with standard type face are for TJ = 25C, and those in bold type face apply over full Operating Temperature Range. Unless otherwise specified, VIN = 5V. PARAMETER TEST CONDITIONS TYP MIN MAX UNIT 3.17/3.14 3.43/3.46 V SYSTEM PARAMETERS Test Circuit of Figure 54 (1) VOUT Output Voltage VIN = 4V to 12V ILOAD = 0.3 to 1.2A 3.3 VOUT/ VIN Line Regulation VIN = 4V to 12V ILOAD = 0.3A 20 50/100 mV VOUT/ ILOAD Load Regulation VIN = 12V ILOAD = 0.3A to 1.2A 20 50/100 mV Efficiency 3.358/3.366 V UNIQUE DEVICE PARAMETERS VIN = 5V, ILOAD = 0.3A VREF Output Reference Voltage Measured at Feedback Pin V = 1.0V VREF Reference Voltage Line Regulation VIN = 4V to 40V GM Error Amp Transconductance ICOMP = -30 A to +30 A VCOMP = 1V AVOL Error Amp Voltage Gain VCOMP = 0.5V to 1.6V RCOMP = 1 M (3) (1) (2) (3) 76% (2) 3.3 3.242/3.234 2 mV 1.193 0.678 260 151/75 2.259 mmho V/V External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the LM2586 is used as shown in Figure 54 and Figure 55, system performance will be as specified by the system parameters. All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. A 1.0 M resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring AVOL. Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 5 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 6.6 Electrical Characteristics: 5 V PARAMETER TEST CONDITIONS TYP MIN MAX UNIT 4.80/4.75 5.20/5.25 V SYSTEM PARAMETERS Test Circuit of COMPFigure 54 (1) VOUT Output Voltage VIN = 4V to 12V ILOAD = 0.3A to 1.1A 5.0 VOUT/ VIN Line Regulation VIN = 4V to 12V ILOAD = 0.3A 20 50/100 mV VOUT/ ILOAD Load Regulation VIN = 12V ILOAD = 0.3A to 1.1A 20 50/100 mV Efficiency 5.088/5.100 V UNIQUE DEVICE PARAMETERS VIN = 12V, ILOAD = 0.6A 80% (2) VREF Output Reference Voltage Measured at Feedback Pin VCOMP = 1 V 5.0 VREF Reference Voltage Line Regulation VIN = 4V to 40V 3.3 GM Error Amp Transconductance ICOMP = -30 A to +30 A VCOMP = 1 V AVOL Error Amp Voltage Gain VCOMP = 0.5V to 1.6V RCOMP = 1 M (3) (1) (2) (3) 6 4.913/4.900 mV 0.750 0.447 165 99/49 1.491 mmho V/V External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the LM2586 is used as shown in Figure 54 and Figure 55, system performance will be as specified by the system parameters. All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. A 1.0 M resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring AVOL. Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 6.7 Electrical Characteristics: 12 V PARAMETER TEST CONDITIONS SYSTEM PARAMETERS Test Circuit of Figure 55 TYP MIN MAX UNIT 11.52/11.40 12.48/12.60 V (1) VOUT Output Voltage VIN = 4V to 10V ILOAD = 0.2A to 0.8A 12 VOUT/ VIN Line Regulation VIN = 4V to 10V ILOAD = 0.2A 20 100/200 mV VOUT/ ILOAD Load Regulation VIN = 10V ILOAD = 0.2A to 0.8A 20 100/200 mV Efficiency 12.21/12.24 V UNIQUE DEVICE PARAMETERS VIN = 10V, ILOAD = 0.6A 93% (2) VREF Output Reference Voltage Measured at Feedback Pin VCOMP = 1.0V 12 VREF Reference Voltage Line Regulation VIN = 4V to 40V 7.8 GM Error Amp Transconductance ICOMP = -30 A to +30 A VCOMP = 1.0V AVOL Error Amp Voltage Gain VCOMP = 0.5V to 1.6V RCOMP = 1.0 M (3) (1) (2) (3) 11.79/11.76 mV 0.328 0.186 70 41/21 0.621 mmho V/V External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the LM2586 is used as shown in Figure 54 and Figure 55, system performance will be as specified by the system parameters. All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. A 1.0 M resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring AVOL. Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 7 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 6.8 Electrical Characteristics: Adjustable PARAMETER TEST CONDITIONS SYSTEM PARAMETERS Test Circuit of Figure 55 TYP MIN MAX UNIT 12.0 11.52/11.40 12.48/12.60 V (1) VOUT Output Voltage VIN = 4V to 10V ILOAD = 0.2A to 0.8A VOUT/ VIN Line Regulation VIN = 4V to 10V ILOAD = 0.2A 20 100/200 mV VOUT/ ILOAD Load Regulation VIN = 10V ILOAD = 0.2A to 0.8A 20 100/200 mV Efficiency VIN = 10V, ILOAD = 0.6A 93 UNIQUE DEVICE PARAMETERS % (2) VREF Output Reference Voltage Measured at Feedback Pin VCOMP = 1.0V VREF Reference Voltage Line Regulation VIN = 4V to 40V GM Error Amp Transconductance ICOMP = -30 A to +30 A VCOMP = 1.0V AVOL Error Amp Voltage Gain IB Error Amp Input Bias Current 1.230 1.208/1.205 1.252/1.255 1.5 V mV 3.200 1.800 VCOMP = 0.5V to 1.6V, RCOMP = 1.0 M (3) 670 400/200 VCOMP = 1.0V 125 425/600 nA 11 15.5/16.5 mA COMMON DEVICE PARAMETERS for all versions 6.000 mmho V/V (2) Input Supply Current ISWITCH = 1.8A 50 100/115 mA IS/D Shutdown Input Supply Current VSH = 3V 16 100/300 A VUV Input Supply Undervoltage Lockout RLOAD = 100 3.30 3.05 3.75 V fO Oscillator Frequency Measured at Switch Pin RLOAD = 100, VCOMP = 1.0V Freq. Adj. Pin Open (Pin 1) 100 85/75 115/125 kHz fSC VEAO IEAO ISS Switch Off (4) IS RSET = 22 k 200 kHz Short-Circuit Frequency Measured at Switch Pin RLOAD = 100 VFEEDBACK = 1.15V 25 kHz Error Amplifier Output Swing Upper Limit (5) 2.8 Lower Limit (4) 0.25 Error Amp Output Current (Source or Sink) See Soft Start Current VFEEDBACK = 0.92V VCOMP = 1.0V (5) Maximum Duty Cycle RLOAD = 100 IL Switch Leakage Current Switch Off VSWITCH = 60V VSUS Switch Sustaining Voltage dV/dT = 1.5V/ns VSAT Switch Saturation Voltage ISWITCH = 3.0A (2) (3) (4) (5) (6) 8 V 0.40/0.55 V (6) DMAX (1) 2.6/2.4 165 110/70 260/320 A 11.0 8.0/7.0 17.0/19.0 A 98% 93%/90% 300/600 A 15 65 0.45 V 0.65/0.9 V External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the LM2586 is used as shown in Figure 54 and Figure 55, system performance will be as specified by the system parameters. All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. A 1.0 M resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring AVOL. To measure this parameter, the feedback voltage is set to a high value, depending on the output version of the device, to force the error amplifier output low and the switch off. To measure this parameter, the feedback voltage is set to a low value, depending on the output version of the device, to force the error amplifier output high and the switch on. To measure the worst-case error amplifier output current, the LM2586 is tested with the feedback voltage set to its low value (Note 4) and at its high value (Note 5). Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Electrical Characteristics: Adjustable (continued) PARAMETER TYP MIN MAX UNIT 4.0 3.0 7.0 A FSYNC = 200 kHz VCOMP = 1V, VIN = 5V 0.75 0.625/0.40 0.875/1.00 V Synchronization Pin Current VIN = 5V VCOMP = 1V, VSYNC = VSTH 100 200 A VSHTH ON/OFF Pin (Pin 1) Threshold Voltage VCOMP = 1V (7) 1.6 1.0/0.8 2.2/2.4 V ISH ON/OFF Pin (Pin 1) Current VCOMP = 1V VSH = VSHTH 40 15/10 65/75 A ICL NPN Switch Current Limit VSTH Synchronization Threshold Voltage ISYNC (7) TEST CONDITIONS When testing the minimum value, do not sink current from this pin--isolate it with a diode. If current is drawn from this pin, the frequency adjust circuit will begin operation (Figure 25). Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 9 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 6.9 Typical Characteristics 10 Figure 1. Supply Current vs Temperature Figure 2. Reference Voltage vs Temperature Figure 3. reference Voltage vs Supply Voltage Figure 4. Supply Current vs Switch Current Figure 5. Current Limit vs Temperature Figure 6. Feedback Pin Bias Current vs Temperature Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Typical Characteristics (continued) Figure 7. Switch Saturation Voltage vs Temperature Figure 8. Switch Transconductance vs Temperature Figure 9. Oscillator Frequency vs Temperature Figure 10. Error Amp Transconductance vs Temperature Figure 11. Error Amp Voltage Gain vs Temperature Figure 12. Short Circuit Frequency vs Temperature Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 11 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Typical Characteristics (continued) Figure 13. Shutdown Supply Current vs Temperature Figure 14. ON/Off Pin Current vs Voltage Figure 15. Oscillator Frequency vs Resistance 12 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 7 Detailed Description 7.1 Overview The LM2586 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3 V, 5 V, 12 V, and adjustable. Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with these switching regulators. 7.2 Functional Block Diagram For Fixed Versions 3.3V, R1 = 3.4k, R2 = 2k 5V, R1 = 6.15k, R2 = 2k 12V, R1 = 8.73k, R2 = 1k For Adj. Version R1 = Short (0), R2 = Open 7.3 Feature Description 7.3.1 Flyback Regulator Operation The LM2586 is ideally suited for use in the flyback regulator topology. The flyback regulator can produce a single output voltage, such as the one shown in Figure 16, or multiple output voltages. In Figure 16, the flyback regulator generates an output voltage that is inside the range of the input voltage. This feature is unique to flyback regulators and cannot be duplicated with buck or boost regulators. The operation of a flyback regulator is as follows (refer to Figure 16): when the switch is on, current flows through the primary winding of the transformer, T1, storing energy in the magnetic field of the transformer. Note that the primary and secondary windings are out of phase, so no current flows through the secondary when current flows through the primary. When the switch turns off, the magnetic field collapses, reversing the voltage polarity of the primary and secondary windings. Now rectifier D1 is forward biased and current flows through it, releasing the energy stored in the transformer. This produces voltage at the output. Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 13 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Feature Description (continued) The output voltage is controlled by modulating the peak switch current. This is done by feeding back a portion of the output voltage to the error amp, which amplifies the difference between the feedback voltage and a 1.230V reference. The error amp output voltage is compared to a ramp voltage proportional to the switch current (in other words, inductor current during the switch on time). The comparator terminates the switch on time when the two voltages are equal, thereby controlling the peak switch current to maintain a constant output voltage. As shown in Figure 16, the LM2586 can be used as a flyback regulator by using a minimum number of external components. The switching waveforms of this regulator are shown in . Typical performance characteristics observed during the operation of this circuit are shown in . Figure 16. 12-V Flyback Regulator Design Example Figure 17. 12-V Flyback Regulator Design Example 14 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Feature Description (continued) (1) As shown in Figure 17, the LM2585 can be used as a flyback regulator by using a minimum number of external components. The switching waveforms of this regulator are shown in Figure 18. Typical characteristics observed during the operation of this circuit are shown in Figure 19. A: Switch Voltage, 20 V/div B: Switch Current, 2 A/div C: Output Rectifier Current, 2 A/div D: Output Ripple Voltage, 50 mV/div AC-Coupled Horizontal: 2 s/div Figure 18. Switching Waveforms Figure 19. VOUT Load Current Step Response Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 15 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Feature Description (continued) 7.3.2 Step-Up (Boost) Regulator Operation Figure 20 shows the LM2586 used as a step-up (boost) regulator. This is a switching regulator that produces an output voltage greater than the input supply voltage. A brief explanation of how the LM2586 boost regulator works is as follows (refer to Figure 20). When the NPN switch turns on, the inductor current ramps up at the rate of VIN/L, storing energy in the inductor. When the switch turns off, the lower end of the inductor flies above VIN, discharging its current through diode (D) into the output capacitor (COUT) at a rate of (VOUT - VIN)/L. Thus, energy stored in the inductor during the switch on time is transferred to the output during the switch off time. The output voltage is controlled by adjusting the peak switch current, as described in . Figure 20. 12-V Boost Regulator By adding a small number of external components (as shown in Figure 20), the LM2586 can be used to produce a regulated output voltage that is greater than the applied input voltage. The switching waveforms observed during the operation of this circuit are shown in Figure 21. Typical performance of this regulator is shown in Figure 22. A: Switch Voltage,10V/div B: Switch Current, 2A/div C: Inductor Current, 2A/div D: Output Ripple Voltage,100 mV/div, AC-Coupled Figure 21. Switching Waveforms 16 Figure 22. VOUT Response To Load Current Step Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Feature Description (continued) 7.3.3 Programming Output Voltage (Selecting R1 And R2) Referring to the adjustable regulator in Figure 26, the output voltage is programmed by the resistors R1 and R2 by the following formula: VOUT = VREF (1 + R1/R2) where * VREF = 1.23V (1) Resistors R1 and R2 divide the output voltage down so that it can be compared with the 1.23V internal reference. With R2 between 1k and 5k, R1 is: R1 = R2 (VOUT/VREF - 1) where * VREF = 1.23V (2) For best temperature coefficient and stability with time, use 1% metal film resistors. 7.3.4 Shutdown Control A feature of the LM2586 is its ability to be shut down using the ON /OFF pin (pin 1). This feature conserves input power by turning off the device when it is not in use. For proper operation, an isolation diode is required (as shown in Figure 23). The device will shut down when 3V or greater is applied on the ON /OFF pin, sourcing current into pin 1. In shut down mode, the device will draw typically 56 A of supply current (16 A to VIN and 40 A to the ON /OFF pin). To turn the device back on, leave pin 1 floating, using an (isolation) diode, as shown in Figure 23 (for normal operation, do not source or sink current to or from this pin--see the next section). Figure 23. Shutdown Operation 7.3.5 Frequency Adjustment The switching frequency of the LM2586 can be adjusted with the use of an external resistor. This feature allows the user to optimize the size of the magnetics and the output capacitor(s) by tailoring the operating frequency. A resistor connected from pin 1 (the Freq. Adj. pin) to ground will set the switching frequency from 100 kHz to 200 kHz (maximum). As shown in Figure 23, the pin can be used to adjust the frequency while still providing the shutdown function. A curve in Typical Characteristics the resistor value to the corresponding switching frequency. Table 1 shows resistor values corresponding to commonly used frequencies. However, changing the LM2586 operating frequency from its nominal value of 100 kHz changes the magnetics selection and compensation component values. Table 1. Frequency Setting Resistor Guide RSET(k) Frequency (kHz) Open 100 200 125 47 150 33 175 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 17 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Feature Description (continued) Table 1. Frequency Setting Resistor Guide (continued) RSET(k) Frequency (kHz) 22 200 7.3.6 Frequency Synchronization Another feature of the LM2586 is the ability to synchronize the switching frequency to an external source, using the sync pin (pin 6). This feature allows the user to parallel multiple devices to deliver more output power. A negative falling pulse applied to the sync pin will synchronize the LM2586 to an external oscillator (see Figure 24 and Figure 25). Use of this feature enables the LM2586 to be synchronized to an external oscillator, such as a system clock. This operation allows multiple power supplies to operate at the same frequency, thus eliminating frequency-related noise problems. Figure 24. Frequency Synchronization Figure 25. Waveforms of a Synchronized 12-V Boost Regulator The scope photo in Figure 25 shows a LM2586 12-V boost regulator synchronized to a 200-kHz signal. There is a 700-ns delay between the falling edge of the sync signal and the turning on of the switch. 18 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Figure 26. Boost Regulator Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 19 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI's customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The LM2586 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with these switching regulators. 8.2 Typical Applications 8.2.1 Typical Flyback Regulator Applications Figure 27 through Figure 32 show six typical flyback applications, varying from single output to triple output. Each drawing contains the part number(s) and manufacturer(s) for every component except the transformer. For the transformer part numbers and manufacturers' names, see Table 2. For applications with different output voltages--requiring the LM2586-ADJ--or different output configurations that do not match the standard configurations, refer to the Switchers Made Simple software. Figure 27. Single-Output Flyback Regulator 20 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Typical Applications (continued) Figure 28. Single-Output Flyback Regulator Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 21 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Typical Applications (continued) Figure 29. Single-Output Flyback Regulator 22 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Typical Applications (continued) Figure 30. Dual-Output Flyback Regulator Figure 31. Dual-Output Flyback Regulator Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 23 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Typical Applications (continued) Figure 32. Triple-Output Flyback Regulator 8.2.1.1 Design Requirements 8.2.1.1.1 Transformer Selection (T) Table 2 lists the standard transformers available for flyback regulator applications. Included in the table are the turns ratio(s) for each transformer, as well as the output voltages, input voltage ranges, and the maximum load currents for each circuit. Table 2. Transformer Selection Table Applications Transformers Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 T7 T7 T7 T6 T6 T5 4V-6V 4V-6V 8V-16V 4V-6V 18V-36V 18V-36V VOUT1 3.3V 5V 12V 12V 12V 5V IOUT1 (Max) 1.4A 1A 0.8A 0.15A 0.6A 1.8A 1 1 1 VIN N1 1.2 1.2 0.5 VOUT2 -12V -12V 12V IOUT2(Max) 0.15A 0.6A 0.25A 1.2 1.2 N2 1.15 VOUT3 -12V IOUT3 (Max) 0.25A N3 24 1.15 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Table 3. Transformer Manufacturer Guide Transformer Type Manufacturers' Part Numbers Coilcraft (1) (2) (3) (4) (1) Coilcraft (1) Surface Mount Pulse (2) Surface Mount Pulse (2) Renco (3) Schott (4) T5 Q4338-B Q4437-B PE-68413 -- RL-5532 67140890 T6 Q4339-B Q4438-B PE-68414 -- RL-5533 67140900 T7 S6000-A S6057-A -- PE-68482 RL-5751 26606 Coilcraft Inc., Phone: (800) 322-2645 1102 Silver Lake Road, Cary, IL 60013 Fax: (708) 639-1469 European Headquarters, 21 Napier Place Phone: +44 1236 730 595 Wardpark North, Cumbernauld, Scotland G68 0LL Fax: +44 1236 730 627 Pulse Engineering Inc., Phone: (619) 674-8100 12220 World Trade Drive, San Diego, CA 92128 Fax: (619) 674 -8262 European Headquarters, Dunmore Road Phone: +353 93 24 107 Tuam, Co. Galway, Ireland Fax: +353 93 24 459 Renco Electronics Inc., Phone: (800) 645-5828 60 Jeffryn Blvd. East, Deer Park, NY 11729 Fax: (516) 586-5562 Schott Corp., Phone: (612) 475-1173 1000 Parkers Lane Road, Wayzata, MN 55391 Fax: (612) 475-1786 8.2.1.1.2 Transformer Footprints Figure 33 through Figure 47 show the footprints of each transformer, listed in Table 3. Figure 33. Coilcraft S6000-A (Top View) Figure 34. Coilcraft Q4339-B (Top View) Figure 35. Coilcraft Q4437-B (Surface Mount) (Top View) Figure 36. Coilcraft Q4338-B (Top View) Figure 37. Coilcraft S6057-A (Surface Mount) (Top View) Figure 38. Coilcraft Q4438-B (Surface Mount) (Top View) Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 25 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Figure 39. Pulse PE-68482 (Top View) Figure 40. Pulse PE-68414 (Surface Mount) (Top View) Figure 42. Renco Rl-5751 (Top View) Figure 41. Pulse PE-68413 (Surface Mount) (Top View) Figure 43. Renco Rl-5533 (Top View) Figure 44. Renco Rl-5532 (Top View) Figure 45. Schott 26606 (Top View) 26 Submit Documentation Feedback Figure 46. Schott 67140900 (Top View) Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Figure 47. Schott 67140890 (Top View) 8.2.1.2 Detailed Design Procedure 8.2.1.2.1 Custom Design With WEBENCH(R) Tools Click here to create a custom design using the LM2586 device with the WEBENCH(R) Power Designer. 1. Start by entering the input voltage (VIN), output voltage (VOUT), and output current (IOUT) requirements. 2. Optimize the design for key parameters such as efficiency, footprint, and cost using the optimizer dial. 3. Compare the generated design with other possible solutions from Texas Instruments. The WEBENCH Power Designer provides a customized schematic along with a list of materials with real-time pricing and component availability. In most cases, these actions are available: * Run electrical simulations to see important waveforms and circuit performance * Run thermal simulations to understand board thermal performance * Export customized schematic and layout into popular CAD formats * Print PDF reports for the design, and share the design with colleagues Get more information about WEBENCH tools at www.ti.com/WEBENCH. 8.2.1.2.2 Flyback Regulator Input Capacitors A flyback regulator draws discontinuous pulses of current from the input supply. Therefore, there are two input capacitors needed in a flyback regulator--one for energy storage and one for filtering (see Figure 48). Both are required due to the inherent operation of a flyback regulator. To keep a stable or constant voltage supply to the LM2586, a storage capacitor (100 F) is required. If the input source is a rectified DC supply and/or the application has a wide temperature range, the required rms current rating of the capacitor might be very large. This means a larger value of capacitance or a higher voltage rating will be needed for the input capacitor. The storage capacitor will also attenuate noise which may interfere with other circuits connected to the same input supply voltage. Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 27 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Figure 48. Flyback Regulator In addition, a small bypass capacitor is required due to the noise generated by the input current pulses. To eliminate the noise, insert a 1-F ceramic capacitor between VIN and ground as close as possible to the device. 8.2.1.2.3 Switch Voltage Limits In a flyback regulator, the maximum steady-state voltage appearing at the switch, when it is off, is set by the transformer turns ratio, N, the output voltage, VOUT, and the maximum input voltage, VIN (maximum): VSW(OFF) = VIN (maximum) + (VOUT +VF)/N where * VF is the forward biased voltage of the output diode, and is typically 0.5 V for Schottky diodes and 0.8 V for ultra-fast recovery diodes (3) In certain circuits, there exists a voltage spike, VLL, superimposed on top of the steady-state voltage (see , waveform A). Usually, this voltage spike is caused by the transformer leakage inductance and/or the output rectifier recovery time. To "clamp" the voltage at the switch from exceeding its maximum value, a transient suppressor in series with a diode is inserted across the transformer primary (as shown in the circuit in Figure 16 and other flyback regulator circuits throughout the datasheet). The schematic in Figure 48 shows another method of clamping the switch voltage. A single voltage transient suppressor (the SA51A) is inserted at the switch pin. This method clamps the total voltage across the switch, not just the voltage across the primary. If poor circuit layout techniques are used (see the Circuit Layout Guideline section), negative voltage transients may appear on the Switch pin (pin 5). Applying a negative voltage (with respect to the IC's ground) to any monolithic IC pin causes erratic and unpredictable operation of that IC. This holds true for the LM2586 IC as well. When used in a flyback regulator, the voltage at the Switch pin (pin 5) can go negative when the switch turns on. The "ringing" voltage at the switch pin is caused by the output diode capacitance and the transformer leakage inductance forming a resonant circuit at the secondary(ies). The resonant circuit generates the "ringing" voltage, which gets reflected back through the transformer to the switch pin. There are two common methods to avoid this problem. One is to add an RC snubber around the output rectifier(s), as in Figure 48. The values of the resistor and the capacitor must be chosen so that the voltage at the Switch pin does not drop below -0.4 V. The resistor may range in value between 10 and 1 k, and the capacitor will vary from 0.001 F to 0.1 F. Adding a snubber will (slightly) reduce the efficiency of the overall circuit. The other method to reduce or eliminate the "ringing" is to insert a Schottky diode clamp between pins 5 and 4 (ground), also shown in Figure 48. This prevents the voltage at pin 5 from dropping below -0.4 V. The reverse voltage rating of the diode must be greater than the switch off voltage. 28 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 Figure 49. Input Line Filter 8.2.1.2.4 Output Voltage Limitations The maximum output voltage of a boost regulator is the maximum switch voltage minus a diode drop. In a flyback regulator, the maximum output voltage is determined by the turns ratio, N, and the duty cycle, D, by the equation: VOUT N x VIN x D/(1 - D) (4) The duty cycle of a flyback regulator is determined by Equation 5: (5) Theoretically, the maximum output voltage can be as large as desired--just keep increasing the turns ratio of the transformer. However, there exists some physical limitations that prevent the turns ratio, and thus the output voltage, from increasing to infinity. The physical limitations are capacitances and inductances in the LM2586 switch, the output diode(s), and the transformer--such as reverse recovery time of the output diode (mentioned above). 8.2.1.2.5 Noisy Input Line Condition A small, low-pass RC filter should be used at the input pin of the LM2586 if the input voltage has an unusually large amount of transient noise, such as with an input switch that bounces. The circuit in Figure 49 demonstrates the layout of the filter, with the capacitor placed from the input pin to ground and the resistor placed between the input supply and the input pin. Note that the values of RIN and CIN shown in the schematic are good enough for most applications, but some readjusting might be required for a particular application. If efficiency is a major concern, replace the resistor with a small inductor (say 10 H and rated at 200 mA). 8.2.1.2.6 Stability All current-mode controlled regulators can suffer from an instability, known as subharmonic oscillation, if they operate with a duty cycle above 50%. To eliminate subharmonic oscillations, a minimum value of inductance is required to ensure stability for all boost and flyback regulators. The minimum inductance is given by: where * VSAT is the switch saturation voltage and can be found in the Characteristic Curves Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 (6) 29 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 8.2.2 Typical Boost Regulator Applications Figure 50 through Figure 53 show four typical boost applications--one fixed and three using the adjustable version of the LM2586. Each drawing contains the part number(s) and manufacturer(s) for every component. For the fixed 12-V output application, the part numbers and manufacturers' names for the inductor are listed in Table 4. For applications with different output voltages, refer to the Switchers Made Simple software. Figure 51. 12-V to 24-V Boost Regulator Figure 50. 5-V to 12-V Boost Regulator The LM2586 requires a heat sink in this application. The size of the heat sink depends on the maximum ambient temperature. To calculate the thermal resistance of the IC and the size of the heat sink needed, see Heat Sink/Thermal Considerations. Figure 52. 24-V to 36-V Boost Regulator The LM2586 requires a heat sink in this application. The size of the heat sink depends on the maximum ambient temperature. To calculate the thermal resistance of the IC and the size of the heat sink needed, see Heat Sink/Thermal Considerations. Figure 53. 24-V to 48-V Boost Regulator 8.2.2.1 Design Requirements Table 4 contains a list of standard inductors, by part number and corresponding manufacturer, for the fixed output regulator of Figure 50. Table 4. Inductor Selection Table (1) (2) (3) (4) 30 Coilcraft (1) Pulse (2) Renco (3) Schott (4) Schott (4) (Surface Mount) DO3316-153 PE-53898 RL-5471-7 67146510 67146540 Coilcraft Inc., Phone: (800) 322-2645 1102 Silver Lake Road, Cary, IL 60013 Fax: (708) 639-1469 European Headquarters, 21 Napier Place Phone: +44 1236 730 595 Wardpark North, Cumbernauld, Scotland G68 0LL Fax: +44 1236 730 627 Pulse Engineering Inc., Phone: (619) 674-8100 12220 World Trade Drive, San Diego, CA 92128 Fax: (619) 674 -8262 European Headquarters, Dunmore Road Phone: +353 93 24 107 Tuam, Co. Galway, Ireland Fax: +353 93 24 459 Renco Electronics Inc., Phone: (800) 645-5828 60 Jeffryn Blvd. East, Deer Park, NY 11729 Fax: (516) 586-5562 Schott Corp., Phone: (612) 475-1173 1000 Parkers Lane Road, Wayzata, MN 55391 Fax: (612) 475-1786 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 8.2.2.2 Detailed Design Procedure See Detailed Design Procedure 8.3 System Examples 8.3.1 Test Circuits CIN1--100 F, 25V Aluminum Electrolytic CIN2--0.1 F Ceramic T--22 H, 1:1 Schott #67141450 D--1N5820 COUT--680 F, 16V Aluminum Electrolytic CC--0.47 F Ceramic RC--2k Figure 54. 3.3-V LM2586 and 5-V LM2586 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 31 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com System Examples (continued) CIN1--100 F, 25V Aluminum Electrolytic CIN2--0.1 F Ceramic L--15 H, Renco #RL-5472-5 D--1N5820 COUT--680 F, 16V Aluminum Electrolytic CC--0.47 F Ceramic RC--2k For 12V Devices: R1 = Short (0) and 2 = Open For ADJ Devices: R1 = 48.75k, 0.1% and 2 = 5.62k, 0.1% Figure 55. LM2586-12 and LM2586-ADJ 32 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 9 Layout 9.1 Layout Guidelines As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance generate voltage transients which can cause problems. For minimal inductance and ground loops, keep the length of the leads and traces as short as possible. Use single point grounding or ground plane construction for best results. Separate the signal grounds from the power grounds (as indicated in Figure 56). When using the adjustable version, physically locate the programming resistors as close as possible to the regulator IC, to keep the sensitive feedback wiring short. 9.2 Layout Example Figure 56. Circuit Board Layout 9.3 Heat Sink/Thermal Considerations In many cases, a heat sink is not required to keep the LM2586 junction temperature within the allowed operating temperature range. For each application, to determine whether or not a heat sink will be required, the following must be identified: 1) Maximum ambient temperature (in the application). 2) Maximum regulator power dissipation (in the application). 3) Maximum allowed junction temperature (125C for the LM2586). For a safe, conservative design, a temperature approximately 15C cooler than the maximum junction temperature should be selected (110C). 4) LM2586 package thermal resistances JA and JC (given in the Electrical Characteristics). Total power dissipated (PD) by the LM2586 can be estimated as follows: where * * * * VIN is the minimum input voltage VOUT is the output voltage N is the transformer turns ratio, D is the duty cycle ILOAD is the maximum load current (and ILOAD is the sum of the maximum load currents for multiple-output flyback regulators) (7) The duty cycle is given by: Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 33 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com Heat Sink/Thermal Considerations (continued) where * * VF is the forward biased voltage of the diode and is typically 0.5 V for Schottky diodes and 0.8 V for fast recovery diodes VSAT is the switch saturation voltage and can be found in the Characteristic Curves (8) When no heat sink is used, the junction temperature rise is: TJ = PD * JA. (9) Adding the junction temperature rise to the maximum ambient temperature gives the actual operating junction temperature: TJ = TJ + TA. (10) If the operating junction temperature exceeds the maximum junction temperature in item 3 above, then a heat sink is required. When using a heat sink, the junction temperature rise can be determined by the following: TJ = PD * (JC + Interface + Heat Sink) (11) Again, the operating junction temperature will be: TJ = TJ + TA (12) As before, if the maximum junction temperature is exceeded, a larger heat sink is required (one that has a lower thermal resistance). Included in the Switchers Made Simple(R) design software is a more precise (non-linear) thermal model that can be used to determine junction temperature with different input-output parameters or different component values. It can also calculate the heat sink thermal resistance required to maintain the regulator junction temperature below the maximum operating temperature. To further simplify the flyback regulator design procedure, Texas Instruments is making available computer design software to be used with the Simple Switcher (R) line of switching regulators. Switchers Made Simple is available on a 31/2 diskette for IBM compatible computers from a Texas Instruments sales office in your area or the Texas Instruments Customer Response Center ((800) 477-8924). 34 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 LM2586 www.ti.com SNVS121E - MAY 1996 - REVISED MAY 2019 10 Device and Documentation Support 10.1 Device Support 10.1.1 Third-Party Products Disclaimer TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE. 10.1.2 Development Support 10.1.2.1 Custom Design With WEBENCH(R) Tools Click here to create a custom design using the LM2586 device with the WEBENCH(R) Power Designer. 1. Start by entering the input voltage (VIN), output voltage (VOUT), and output current (IOUT) requirements. 2. Optimize the design for key parameters such as efficiency, footprint, and cost using the optimizer dial. 3. Compare the generated design with other possible solutions from Texas Instruments. The WEBENCH Power Designer provides a customized schematic along with a list of materials with real-time pricing and component availability. In most cases, these actions are available: * Run electrical simulations to see important waveforms and circuit performance * Run thermal simulations to understand board thermal performance * Export customized schematic and layout into popular CAD formats * Print PDF reports for the design, and share the design with colleagues Get more information about WEBENCH tools at www.ti.com/WEBENCH. 10.2 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document. 10.3 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2ETM Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 10.4 Trademarks E2E is a trademark of Texas Instruments. WEBENCH is a registered trademark of Texas Instruments. Switchers Made Simple, Simple Switcher are registered trademarks of dcl_owner. All other trademarks are the property of their respective owners. Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 35 LM2586 SNVS121E - MAY 1996 - REVISED MAY 2019 www.ti.com 10.5 Electrostatic Discharge Caution This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. 10.6 Glossary SLYZ022 -- TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 11 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 36 Submit Documentation Feedback Copyright (c) 1996-2019, Texas Instruments Incorporated Product Folder Links: LM2586 PACKAGE OPTION ADDENDUM www.ti.com 9-Jun-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (C) Device Marking (4/5) LM2586S-12/NOPB ACTIVE DDPAK/ TO-263 KTW 7 45 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -12 P+ LM2586S-3.3/NOPB ACTIVE DDPAK/ TO-263 KTW 7 45 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -3.3 P+ LM2586S-5.0/NOPB ACTIVE DDPAK/ TO-263 KTW 7 45 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -5.0 P+ LM2586S-ADJ/NOPB ACTIVE DDPAK/ TO-263 KTW 7 45 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -ADJ P+ LM2586SX-3.3/NOPB ACTIVE DDPAK/ TO-263 KTW 7 500 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -3.3 P+ LM2586SX-5.0/NOPB ACTIVE DDPAK/ TO-263 KTW 7 500 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -5.0 P+ LM2586SX-ADJ/NOPB ACTIVE DDPAK/ TO-263 KTW 7 500 Green (RoHS & no Sb/Br) SN Level-3-245C-168 HR -40 to 125 LM2586S -ADJ P+ LM2586T-3.3/NOPB ACTIVE TO-220 NDZ 7 45 Green (RoHS & no Sb/Br) SN Level-1-NA-UNLIM -40 to 125 LM2586T -3.3 P+ LM2586T-5.0/NOPB ACTIVE TO-220 NDZ 7 45 Green (RoHS & no Sb/Br) SN Level-1-NA-UNLIM -40 to 125 LM2586T -5.0 P+ LM2586T-ADJ NRND TO-220 NDZ 7 45 TBD Call TI Call TI -40 to 125 LM2586T -ADJ P+ LM2586T-ADJ/NOPB ACTIVE TO-220 NDZ 7 45 Green (RoHS & no Sb/Br) SN Level-1-NA-UNLIM -40 to 125 LM2586T -ADJ P+ (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 9-Jun-2020 (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 30-May-2019 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM2586SX-3.3/NOPB DDPAK/ TO-263 KTW 7 500 330.0 24.4 10.75 14.85 5.0 16.0 24.0 Q2 LM2586SX-5.0/NOPB DDPAK/ TO-263 KTW 7 500 330.0 24.4 10.75 14.85 5.0 16.0 24.0 Q2 LM2586SX-ADJ/NOPB DDPAK/ TO-263 KTW 7 500 330.0 24.4 10.75 14.85 5.0 16.0 24.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 30-May-2019 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM2586SX-3.3/NOPB DDPAK/TO-263 KTW 7 500 367.0 367.0 45.0 LM2586SX-5.0/NOPB DDPAK/TO-263 KTW 7 500 367.0 367.0 45.0 LM2586SX-ADJ/NOPB DDPAK/TO-263 KTW 7 500 367.0 367.0 45.0 Pack Materials-Page 2 MECHANICAL DATA NDZ0007B TA07B (Rev E) www.ti.com MECHANICAL DATA KTW0007B TS7B (Rev E) BOTTOM SIDE OF PACKAGE www.ti.com IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES "AS IS" AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource. Other reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims, damages, costs, losses, and liabilities arising out of your use of these resources. TI's products are provided subject to TI's Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on ti.com or provided in conjunction with such TI products. TI's provision of these resources does not expand or otherwise alter TI's applicable warranties or warranty disclaimers for TI products. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2020, Texas Instruments Incorporated