(R) REG1117 REG1117A REG 111 7 For most current data sheet and other product information, visit www.burr-brown.com 800mA and 1A Low Dropout Positive Regulator 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable FEATURES DESCRIPTION FIXED AND ADJUSTABLE VERSIONS The REG1117 is a family of easy-to-use three-terminal voltage regulators. The family includes a variety of fixed- and adjustable-voltage versions, two currents (800mA and 1A) and two package types (SOT-223 and DDPAK). See the chart below for available options. Output voltage of the adjustable versions is set with two external resistors. The REG1117's low dropout voltage allows its use with as little as 1V input-output voltage differential. Laser trimming assures excellent output voltage accuracy without adjustment. An NPN output stage allows output stage drive to contribute to the load current for maximum efficiency. 2.85V MODEL FOR SCSI-2 ACTIVE TERMINATION OUTPUT CURRENT: REG1117: 800mA max REG1117A: 1A max OUTPUT TOLERANCE: 1% max DROPOUT VOLTAGE: REG1117: 1.2V max at IO = 800mA REG1117A: 1.3V max at IO = 1A INTERNAL CURRENT LIMIT THERMAL OVERLOAD PROTECTION SOT-223 AND DDPAK SURFACE MOUNT PACKAGES APPLICATIONS 800mA SCSI-2 ACTIVE TERMINATION HAND-HELD DATA COLLECTION DEVICES HIGH EFFICIENCY LINEAR REGULATORS BATTERY POWERED INSTRUMENTATION BATTERY MANAGEMENT CIRCUITS FOR NOTEBOOK AND PALMTOP PCs CORE VOLTAGE SUPPLY: FPGA, PLD, DSP, CPU VOLTAGE SOT-223 1A DDPAK 1.8V 2.5V 2.85V 3.3V 5V Adj. SOT-223 DDPAK International Airport Industrial Park * Mailing Address: PO Box 11400, Tucson, AZ 85734 * Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 * Tel: (520) 746-1111 Twx: 910-952-1111 * Internet: http://www.burr-brown.com/ * Cable: BBRCORP * Telex: 066-6491 * FAX: (520) 889-1510 * Immediate Product Info: (800) 548-6132 (R) (c) 1992 Burr-Brown Corporation SBVS001 1 PDS-1162J REG1117 Printed in U.S.A. December, 1999 SPECIFICATIONS At TJ = +25C, unless otherwise noted. REG1117, REG1117A PARAMETER CONDITIONS MIN TYP MAX UNITS Note 1 IO = 10mA, VIN = 4.85V IO = 0 to 800mA, VIN = 4.05 to 10V 2.820 2.790 2.85 2.85 2.880 2.910 V V Note 1 IO = 10mA, VIN = 5.3V IO = 0 to 800mA, VIN = 4.8 to 10V 3.270 3.240 3.30 3.30 3.330 3.360 V V Note 1 IO = 10mA, VIN = 7V IO = 0 to 800mA, VIN = 6.5 to 10V 4.950 4.900 5.00 5.00 5.050 5.100 V V Note 1 IO = 10mA, VIN = 3.8V IO = 0 to 1A, VIN = 3.8V to 10V 1.782 1.764 1.8 1.8 1.818 1.836 V V Note 1 IO = 10mA, VIN = 4.5V IO = 0 to 1A, VIN = 4.5V to 10V 2.475 2.450 2.5 2.5 2.525 2.550 V V Note 1 IO = 10mA, VIN = 7V IO = 0 to 1A, VIN = 7V to 10V 4.950 4.900 5.0 5.0 5.050 5.100 V V Note 1 IO = 10mA, VIN - VO = 2V IO = 10 to 800mA, VIN - VO = 1.4 to 10V 1.238 1.225 1.250 1.250 1.262 1.280 V V Note 1 IO = 10mA, VIN - VO = 2V IO = 10mA to 1A, VIN - VO = 1.4 to 10V 1.238 1.225 1.250 1.250 1.262 1.280 V V OUTPUT VOLTAGE REG1117-2.85 REG1117-3.3 REG1117-5 REG1117A-1.8 REG1117A-2.5 REG1117A-5 REFERENCE VOLTAGE REG1117 (Adjustable) REG1117A (Adjustable) LINE REGULATION REG1117-2.85 REG1117-3.3 REG1117-5 REG1117 (Adjustable) REG1117A (Adjustable) REG1117A-1.8 REG1117A-2.5 REG1117A-5.0 LOAD REGULATION REG1117-2.85 REG1117-3.3 REG1117-5 REG1117 (Adjustable) REG1117A (Adjustable) REG1117A-1.8 REG1117A-2.5 REG1117A-5 DROPOUT VOLTAGE All Models REG1117 Models REG1117A Note Note Note Note Note Note Note Note 1 1 1 1 1 1 1 1 IO = 0, VIN = 4.25 to 10V IO = 0, VIN = 4.8 to 10V IO = 0, VIN = 6.5 to 15V IO = 10mA, VIN - VO = 1.5 to 13.75V IO = 10mA, VIN - VO = 1.5 to 13.75V IO = 0, VIN = 3.8V to 10V IO = 0, VIN = 4.5V to 10V IO = 0, VIN = 7V to 15V 1 2 3 0.1 0.1 1 1 3 7 7 10 0.4 0.4 7 7 10 mV mV mV % % mV mV mV Note Note Note Note 1, Note 1, 1 1 1 2 2 IO = 0 to 800mA, VIN = 4.25V IO = 0 to 800mA, VIN = 4.8V IO = 0 to 800mA, VIN = 6.5V IO = 10 to 800mA, VIN - VO = 3V IO = 10mA to 1A, VIN - VO = 3V IO = 0 to 1A, VIN = 3.8V IO = 0 to 1A, VIN = 4.5V IO = 0 to 1A, VIN = 7.0V 2 3 3 0.1 0.1 2 2 3 10 12 15 0.4 0.4 10 10 15 mV mV mV % % mV mV mV Note Note Note Note 3 1 1 1 IO = 100mA IO = 500mA IO = 800mA IO = 1A IO = 1A 1.00 1.05 1.10 1.2 1.2 1.10 1.15 1.20 1.30 1.55 V V V V V 950 1250 1200 1600 mA mA 1.7 5 mA Note 1 CURRENT LIMIT REG1117 Models REG1117A MINIMUM LOAD CURRENT Adjustable Models QUIESCENT CURRENT Fixed-Voltage Models Adjust Pin Current vs Load Current, REG1117 vs Load Current, REG1117A THERMAL REGULATION All Models RIPPLE REJECTION All Models TEMPERATURE DRIFT Fixed-Voltage Models Adjustable Models VIN - VO = 5V VIN - VO = 5V Note 1, 2 Note 1 Note 1, 2 Note 1 Note 1 Note 4 VIN - VO = 13.75V VIN - VO = 5V 4 10 mA IO = 10mA, VIN - VO = 1.4 to 10V IO = 10mA to 800mA, VIN - VO = 1.4 to 10V IO = 10mA to 1A, VIN - VO = 1.4 to 10V 50 0.5 0.5 120 5 5 A A A 30ms Pulse 0.01 0.1 %/W f = 120Hz, VIN - VOUT = 3V+1VPP Ripple 62 dB TJ = 0C to +125C TJ = 0C to +125C 0.5 2 % % (R) REG1117 800 1000 2 SPECIFICATIONS (cont.) At TJ = +25C, unless otherwise noted. REG1117, REG1117A PARAMETER CONDITIONS LONG-TERM STABILITY All Models OUTPUT NOISE r ms Noise, All Models THERMAL RESISTANCE Operating Junction Temperature Range Storage Range Thermal Resistance, JC 3-Lead SOT-223 Surface-Mount 3-Lead DDPAK Surface-Mount MIN TYP MAX UNITS TA = +125C, 1000Hr 0.3 % f = 10Hz to 10kHz 0.003 % 0 -65 +125 +150 C C (Junction-to-Case at Tab) f > 50Hz dc (Junction-to-Case at Tab) No Heat Sink Thermal Resistance, JA 3-Lead DDPAK Surface-Mount 15 2 3 C/W C/W C/W 65 C/W NOTES: (1) Specification applies over the full operating Junction temperature range, 0C to 125C. (2) REG1117 and REG1117A adjustable versions require a minimum load current for 3% regulation. (3) Dropout voltage is the Input voltage minus output voltage that produces a 1% decrease in output voltage. (4) Percentage change in unloaded output voltage before vs after a 30ms power pulse of IO = 800mA (REG1117 models), IO = 1A (REG1117A), VIN - VO = 1.4V (Reading taken 10ms after pulse). ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY Power Dissipation ........................................................... Internally Limited Input Voltage ........................................................................................ 15V Operating Junction Temperature Range ............................. 0C to +125C Storage Temperature Range .......................................... -65C to +150C Lead Temperature (soldering, 10s)(2) ............................................ +300C This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. NOTE: (1) Stresses above these ratings may cause permanent damage. (2) See "Soldering Methods." 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. CONNECTION DIAGRAM Front View Plastic SOT-223 Plastic DDPAK Tab is VOUT Tab is VOUT Ground VOUT (Adj.)(1) VIN Ground VOUT (Adj.)(1) VIN NOTE: (1) Adjustable-Voltage Model. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. (R) 3 REG1117 PACKAGE/ORDERING INFORMATION PRODUCT VO /IO PACKAGE PACKAGE DRAWING NUMBER SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ORDERING NUMBER(1) TRANSPORT MEDIA 2.85 /800mA "/ " SOT-223 311 -40C to +85C BB11172 " " " " REG1117-2.85 REG1117-2.85/2K5 Rails Tape and Reel 3.3 /800mA "/ " SOT-223 311 -40C to +85C BB11174 " " " " REG1117-3.3 REG1117-3.3/2K5 Rails Tape and Reel 3.3 /800mA "/ " DDPAK-3 339 -40C to +85C BB1117F4 " " " " REG1117F-3.3 REG1117F-3.3/500 Rails Tape and Reel 5V/800mA "/ " SOT-223 311 -40C to +85C BB11175 " " " " REG1117-5 REG1117-5/2K5 Rails Tape and Reel Adj./800mA "/ " SOT-223 311 -40C to +85C BB1117 " " " " REG1117 REG1117/2K5 Rails Tape and Reel 1.8V/1A "/ " SOT-223 311 -40C to +85C R111718 " " " " REG1117A-1.8 REG1117A-1.8/2K5 Rails Tape and Reel 1.8/1A "/ " DDPAK-3 339 -40C to +85C REG1117FA1.8 " " " " REG1117FA-1.8 REG1117FA-1.8/500 Rails Tape and Reel 2.5/1A "/ " SOT-223 311 -40C to +85C R111725 " " " " REG1117A-2.5 REG1117A-2.5/2K5 Rails Tape and Reel 2.5/1A "/ " DDPAK-3 339 -40C to +85C REG1117FA2.5 " " " " REG1117FA-2.5 REG1117FA-2.5/500 Rails Tape and Reel 5/1A "/ " DDPAK-3 339 -40C to +85C REG1117FA5.0 " " " " REG1117FA-5 REG1117FA-5/500 Rails Tape and Reel Adj./1A "/ " SOT-223 311 -40C to +85C BB1117A " " " " REG1117A REG1117A/2K5 Rails Tape and Reel Adj./1A "/ " DDPAK-3 339 -40C to +85C REG1117FA " " " " REG1117FA REG1117FA/500 Rails Tape and Reel 800mA Output REG1117-2.85 " REG1117-3.3 " REG1117F-3.3 " REG1117-5 " REG1117 " 1A Output REG1117A-1.8 " REG1117FA-1.8 " REG1117A-2.5 " REG1117FA-2.5 " REG1117FA-5 " REG1117A " REG1117FA " NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of "REG1117/2K5" will get a single 2500-piece Tape and Reel. SIMPLIFIED SCHEMATIC VIN + Current Limit Thermal Limit VOUT 10X (Substrate) Ground (Fixed-Voltage Models) Adj. (Adjustable-Voltage Model) (R) REG1117 4 TYPICAL PERFORMANCE CURVES At TJ = +25C, all models, unless otherwise specified. LOAD REGULATION ILOAD = 800mA SHORT-CIRCUIT CURRENT vs TEMPERATURE 1 Output Voltage Deviation (mV) Short-Circuit Current (mA) 1400 1300 REG1117A 1200 1100 REG1117 Models 1000 900 800 -50 -25 0 25 50 75 0 REG1117-2.85 -1 REG1117A-1.8 -2 -3 -4 REG1117-5 -5 -6 -7 -50 100 -25 0 Temperature (C) LINE REGULATION vs TEMPERATURE 75 100 RIPPLE REJECTION vs FREQUENCY IOUT = 100mA VRIPPLE = 1.0Vp-p 90 5 VIN = 6.5V to 15V REG1117-5 80 Ripple Rejection (dB) 4 3 2 1 REG1117-1.8 VIN = 3.8V to 10V 0 70 60 50 40 30 20 -1 10 -2 -50 0 -25 0 25 50 75 100 10 100 1k Temperature (C) 10k 100k Frequency (Hz) OUTPUT VOLTAGE vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 2.0 8 IO = 10mA 7 Quiescent Current (mA) Output Voltage Change (%) 50 100 6 Output Voltage Change (mV) 25 Temperature (C) 1.0 0 -1.0 Fixed-Voltage Models 6 5 4 3 2 1 -2.0 -50 -25 0 25 50 75 0 -50 100 -25 0 25 50 75 100 Temperature (C) Temperature (C) (R) 5 REG1117 TYPICAL PERFORMANCE CURVE (cont.) At TJ = +25C, all models, unless otherwise specified. LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE Output Voltage Deviation (mV) Output Voltage Deviations (V) 60 0.1 0 -0.1 CIN = 1F COUT = 10F Tantalum IOUT = 0.1A 40 20 0 0.5 0 -0.5 0 20 40 60 Time (s) 80 100 Input Voltage (V) Load Current (A) -20 CIN = 10F COUT = 10F Tantalum VIN = 4.25V Preload = 0.1A -40 5.25 4.25 3.25 0 20 40 60 80 100 120 140 160 180 Time (s) APPLICATIONS INFORMATION Figure 1 shows the basic hookup diagram for fixed-voltage models. All models require an output capacitor for proper operation and to improve high frequency load regulation. A 10F tantalum capacitor is recommended. Aluminum electrolytic types of 50F or greater can also be used. A high quality capacitor should be used to assure that the ESR (effective series resistance) is less than 0.5. VIN 10F Tantalum Figure 2 shows a hookup diagram for the adjustable voltage model. Resistor values are shown for some commonly used output voltages. Values for other voltages can be calculated from the equation shown in Figure 2. For best load regulation, connect R1 close to the output pin and R2 close to the ground side of the load as shown. VIN 3 C1 + 10F REG1117 (Adj) 1 C3(1) + 10F R1 + C2 10F Load VO = R1 + R2 R1 + 10F Tantalum FIGURE 1. Fixed-Voltage Model--Basic Connections. * (1.25V) + (50A) (R2) R2 This term is negligible with proper choice of values--see table at right. NOTE: (1) C3 optional. Improves high-frequency line rejection. (2) Resistors are standard 1% values. FIGURE 2. Adjustable-Voltage Model--Basic Connections. (R) REG1117 + VO 2 VO REG1117 6 VOUT (V) R1 () (2) R2 () (2) 1.25 1.5 2.1 2.85 3 3.3 5 10 Open 750 158 169 137 115 113 113 Short 147 107 215 191 187 340 787 200 THERMAL CONSIDERATIONS until the device's thermal shutdown is activated. If this occurs at more than 40C above the maximum expected ambient temperature, then the TJ will be less than 125C during normal operation. The REG1117 has current limit and thermal shutdown circuits that protect it from overload. The thermal shutdown activates at approximately TJ = 165C. For continuous operation, however, the junction temperature should not be allowed to exceed 125C. Any tendency to activate the thermal shutdown in normal use is an indication of an inadequate heat sink or excessive power dissipation. The power dissipation is equal to: PD = (VIN - VOUT) IOUT The internal protection circuitry of the REG1117 was designed to protect against overload conditions. It was not intended to replace proper heat sinking. Continuously running the REG1117 into thermal shutdown will degrade reliability. LAYOUT CONSIDERATIONS The junction temperature can be calculated by: TJ = TA + PD (JA) The DDPAK (REG1117F-3.3 and REG1117FA) is a surface-mount power package that has excellent thermal characteristics. For best thermal performance, its mounting tab should be soldered directly to a circuit board copper area (see Figure 3). Increasing the copper area improves heat dissipation. Figure 4 shows typical thermal resistance from junction-to-ambient as a function of the copper area. where TA is the ambient temperature, and JA is the junction-to-ambient thermal resistance A simple experiment will determine whether the maximum recommended junction temperature is exceeded in an actual circuit board and mounting configuration: Increase the ambient temperature above that expected in normal operation 3-Lead DDPAK(1) 0.2 0.085 0.45 0.51 All measurements in inches. 0.05 0.155 0.10 NOTE: (1) For improved thermal performance increase footprint area. See Figure 4, "Thermal Resistance vs Circuit Board Copper Area". FIGURE 3. DDPAK Thermal Resistance vs Circuit Board Copper Area. THERMAL RESISTANCE vs CIRCUIT BOARD COPPER AREA Thermal Resistance, JA (C/W) 60 Circuit Board Copper Area REG1117F DDPAK Surface Mount Package 1oz copper 50 40 30 20 REG1117F DDPAK Surface Mount Package 10 0 1 2 3 4 5 Copper Area (inches2) FIGURE 4. DDPAK Thermal Resistance vs Circuit Board Copper Area. (R) 7 REG1117 The SOT-223 package derives heat sinking from conduction through its copper leads, especially the large mounting tab. These must be soldered to a circuit board with a substantial amount of copper remaining (see Figure 5). Circuit board traces connecting the tab and the leads should be made as large as practical. The mounting tab of both packages is electrically connected to VOUT. TOTAL PC BOARD AREA Total Area: 50 x 50mm 35 x 17 mm TOPSIDE(1) COPPER AREA BACKSIDE COPPER AREA SOT-223 THERMAL RESISTANCE JUNCTION-TO-AMBIENT 2500mm2 2500mm2 2500mm2 46C/W 2500mm2 1250mm2 2500mm2 47C/W 2500mm2 950mm2 2500mm2 49C/W 2500mm2 2500mm2 0 51C/W 2500mm2 1800mm2 0 53C/W 1600mm2 600mm2 1600mm2 55C/W 2500mm2 1250mm2 0 58C/W 2500mm2 915mm2 0 59C/W 1600mm2 600mm2 0 67C/W 900mm2 340mm2 900mm2 72C/W 900mm2 340mm2 0 85C/W NOTE: (1) Tab is attached to the topside copper. TABLE I. 16 x 10 mm 16 x 10 mm INSPEC Abstract Number: B91007604, C91012627 Kelly, E.G. "Thermal Characteristics of Surface 5WK9 Packages." The Proceedings of SMTCON. Surface Mount Technology Conference and Exposition: Competitive Surface Mount Technology, April 3-6, 1990, Atlantic City, NJ, USA. Abstract Publisher: IC Manage, 1990, Chicago, IL, USA. Without back-side copper: JA 59C/W With solid back-side copper: JA 49C/W FIGURE 5. SOT-223 Circuit Board Layout Example. Other nearby circuit traces, including those on the back side of the circuit board, help conduct heat away from the device, even though they may not be electrically connected. Make all nearby copper traces as wide as possible and leave only narrow gaps between traces. MAXIMUM POWER DISSIPATION vs AMBIENT TEMPERATURE Power Dissipation (Watts) 6 Table I shows approximate values of JA for various circuit board and copper areas for the SOT-223 package. Nearby heat dissipating components, circuit board mounting conditions and ventilation can dramatically affect the actual JA. Proper heat sinking significantly increases the maximum power dissipation at a given ambient temperature as shown in Figure 6. JA = 27C/W (4in2 one oz copper mounting pad) 5 PD = (TJ (max) - TA) / JA TJ (max) = 150C JA = 46C/W (2500mm2 topside and backside copper) 4 DDPAK SOT-223 3 JA = 65C/W (no heat sink) 2 JA = 85C/W (340mm2 topside copper, no backside copper) 1 0 0 SOLDERING METHODS 25 50 75 Both REG1117 packages are suitable for infrared reflow and vapor-phase reflow soldering techniques. The high rate of temperature change that occurs with wave soldering, or hand soldering can damage the REG1117. TERMPWR 2.85V 1N5817 110 110 REG1117-2.85 10F 125 FIGURE 6. Maximum Power Dissipation vs Ambient Temperature. TERMPWR 5V 100 Ambient Temperature (C) 1N5817 REG1117-2.85 10F 10F (Up to 27 Lines) 110 110 FIGURE 7. SCSI Active Termination Configuration. (R) REG1117 2.85V 5V 8 10F REG1117-5 In VIN > 12V 10F REG1117-5 Out + 5V to 10V + GND In VIN > 9.0V 100F 10F + Out 7.5V + GND 100F 2.5VOUT 10F + 1k REF1004-2.5 FIGURE 8. Adjusting Output of Fixed Voltage Models. FIGURE 9. Regulator with Reference. REG1117-5 VIN In 10F 5.2V Line 5.0V Battery Out GND + 50 1k REG1117-5 In 6.5V 10F Out GND + + 100F FIGURE 10. Battery Backed-Up Regulated Supply. REG1117-5 In VIN 10F + Out GND + 100F VOUT = -5V Floating Input FIGURE 11. Low Dropout Negative Supply. (R) 9 REG1117 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof. Copyright 2000, Texas Instruments Incorporated