MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators General Description Features The MAX603/MAX604 low-dropout, low quiescent current, linear regulators supply 5V, 3.3V, or an adjustable output for currents up to 500mA. They are available in a 1.8W SO package. Typical dropouts are 320mV at 5V and 500mA, or 240mV at 3.3V and 200mA. Quiescent currents are 15A typ and 35A max. Shutdown turns off all circuitry and puts the regulator in a 2A off mode. A unique protection scheme limits reverse currents when the input voltage falls below the output. Other features include foldback current limiting and thermal overload protection. The output is preset at 3.3V for the MAX604 and 5V for the MAX603. In addition, both devices employ Dual ModeTM operation, allowing user-adjustable outputs from 1.25V to 11V using external resistors. The input voltage supply range is 2.7V to 11.5V. The MAX603/MAX604 feature a 500mA P-channel MOSFET pass transistor. This transistor allows the devices to draw less than 35A over temperature, independent of the output current. The supply current remains low because the P-channel MOSFET pass transistor draws no base currents (unlike the PNP transistors of conventional bipolar linear regulators). Also, when the input-to-output voltage differential becomes small, the internal P-channel MOSFET does not suffer from excessive base current losses that occur with saturated PNP transistors. Typical Operating Circuit OUT IN MAX603 MAX604 BATTERY CIN 10F OFF GND 500mA Output Current, with Foldback Current Limiting High-Power (1.8W) 8-Pin SO Package Dual ModeTM Operation: Fixed or Adjustable Output from 1.25V to 11V Large Input Range (2.7V to 11.5V) Internal 500mA P-Channel Pass Transistor 15A Typical Quiescent Current 2A (Max) Shutdown Mode Thermal Overload Protection Reverse-Current Protection Applications 5V and 3.3V Regulators 1.25V to 11V Adjustable Regulators Battery-Powered Devices Pagers and Cellular Phones Portable Instruments Solar-Powered Instruments Ordering Information appears at end of data sheet. Pin Configuration OUTPUT VOLTAGE TOP VIEW IN 1 COUT 10F SET GND 2 GND 3 MAX603 MAX604 OFF 4 DIP/SO Dual Mode is a trademark of Maxim Integrated Products. 19-0269; Rev 1; 4/17 8 OUT 7 GND 6 GND 5 SET MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Absolute Maximum Ratings Supply Voltage (IN or OUT to GND)......................-0.3V to +12V Output Short-Circuit Duration.............................................. 1 min Continuous Output Current...............................................600mA SET, OFF Input Voltages........................... -0.3V to the greater of (IN + 0.3V) or (OUT + 0.3V) Continuous Power Dissipation (TA = +70C) Plastic DIP (derate 9.09mW/C above +70C).............727mW SO (derate 23.6mW/C above +70C).............................1.8W CERDIP (derate 8.00mW/C above +70C).................640mW Operating Temperature Ranges MAX60_C_A........................................................0C to +70C MAX60_E_A.................................................... -40C to +85C MAX60_MJA.................................................. -55C to +125C Junction Temperature.......................................................+150C Storage Temperature Range............................. -65C to +160C Lead Temperature (soldering, 10sec).............................. +300C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VIN = 6V (MAX603) or 4.3V (MAX604), CIN = COUT = 10F, OFF = VIN, SET = GND, TJ = TMIN to TMAX, unless otherwise noted. Typical values are at TJ = +25C.) (Note 1) PARAMETER Input Voltage Output Voltage (Note 2) Load Regulation SYMBOL VIN VOUT VLDR CONDITIONS SET = OUT, RL = 1k VLNR VDO OFF Quiescent Current Minimum Load Current IQ IQ OFF IOUT MIN 11.5 MAX60_E 2.9 11.5 11.5 3.0 MAX603 4.75 5.00 5.25 IOUT = 20A to 300mA, 4.3V < VIN < 11.5V MAX604 3.15 3.30 3.45 60 100 IOUT = 1mA to 500mA MAX603C/E MAX603M 150 30 100 (VOUT + 0.5V) VIN 11.5V, IOUT = 25mA 7 40 130 220 320 550 240 410 480 820 15 35 IOUT = 500mA IOUT = 200mA 3.0V VIN 11.5V, SET = OUT OFF 0.4V, RL = 1k, (VOUT + 1V) VIN 11.5V VIN = 11.5V, SET = OUT UNITS V V MAX604 IOUT = 400mA Quiescent Current MAX MAX60_M IOUT = 200mA Dropout Voltage (Note 3) TYP 2.7 IOUT = 20A to 500mA, 6.0V < VIN < 11.5V IOUT = 1mA to 300mA Line Regulation MIN MAX60_C MAX603 MAX604 MAX60_C/E MAX60_M MAX60_C 40 0.01 10 MAX60_M 20 MAX60_C 2 MAX60_E 6 MAX60_M 20 350 VOUT > 0.8V and VIN - VOUT > 0.7V 1200 mV mV A 2 MAX60_E VOUT < 0.8V mV A A Foldback Current Limit (Note 4) ILIM Thermal Shutdown Temperature TSD 160 C TSD 10 C Thermal Shutdown Hysteresis www.maximintegrated.com mA Maxim Integrated 2 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Electrical Characteristics (continued) (VIN = 6V (MAX603) or 4.3V (MAX604), CIN = COUT = 10F, OFF = VIN, SET = GND, TJ = TMIN to TMAX, unless otherwise noted. Typical values are at TJ = +25C.) (Note 1) PARAMETER Reverse-Current Protection Threshold (Note 5) Reverse Leakage Current SYMBOL VRTH IRVL TYP MAX VOUT = 4.5V CONDITIONS MAX603 6 20 VOUT = 3.0V MAX604 6 20 0.01 10 VIN = 0V, VOUT = 4.5V (MAX603) VOUT = 3.0V (MAX604) MIN MAX60_C MAX60_E MAX60_M Start-Up Overshoot VOSH RL = 1k, COUT = 10F, OFF rise time 1s Time Required to Exit Shutdown tSTART VIN = 9V, RL = 18, VOFF switched from 0V to VIN, time from 0% to 95% of VOUT Dual-Mode SET Threshold VSET TH 150 1.16 VSET SET = OUT, RL = 1k ISET VSET = 1.5V or 0V IOUT LKG VIL OFF OFF Threshold Voltage OFF Input Leakage Current Output Noise (Note 6) VIH OFF IOFF en VIN = 11.5V, VOUT = 2V, SET = OUT MAX60_C %VOUT 200 s 30 80 1.20 1.24 V 10 nA 0.01 2 6 MAX60_M 20 Off A 0.4 On, SET = OUT, VIN = 4V 2.0 On, SET = OUT, VIN = 6V 3.0 On, SET = OUT, VIN = 11.5V 4.0 10Hz to 10kHz, SET = OUT, RL = 1k, COUT = 10F mV 0.01 MAX60_E VOFF = VIN or GND A 2 80 For external feedback SET Input Leakage Current mV 100 For internal feedback SET Reference Voltage OUT Leakage Current 20 UNITS V 0.01 250 10 nA VRMS Note 1: Electrical specifications are measured by pulse testing and are guaranteed for a junction temperature (TJ) equal to the operating temperature range. C and E grade parts may be operated up to a TJ of +125. Expect performance similar to M grade specifications. For TJ between +125C and +150C, the output voltage may drift more. Note 2: (VIN - VOUT) is limited to keep the product (IOUT x (VIN - VOUT)) from exceeding the package power dissipation limits. Note 3: Dropout Voltage is (VIN - VOUT) when VOUT falls to 100mV below its nominal value at VIN = VOUT + 2V. For example, the MAX603 is tested by measuring the VOUT at VIN = 7V, then VIN is lowered until VOUT falls 100mV below the measured value. The difference (VIN - VOUT) is then measured and defined as VDO. Note 4: Foldback Current Limit was characterized by pulse testing to remain below the maximum junction temperature. Note 5: The Reverse-Current Protection Threshold is the output/input differential voltage (VOUT - VIN) at which reverse-current protection switchover occurs and the pass transistor is turned off. Note 6: Noise is tested using a bandpass amplifier with two poles at 10Hz and two poles at 10kHz. www.maximintegrated.com Maxim Integrated 3 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Typical Operating Characteristics (VIN = 7V for MAX603, VIN = 5.3V for MAX604, OFF = VIN, SET = GND, CIN = COUT = 10F, RL = 1k, TJ = +25C, unless otherwise noted.) NORMALIZED TO OUTPUT VOLTAGE AT 1mA 0.96 0.95 0.1 100 QUIESCENT CURRENT vs. TEMPERATURE 102 101 100 99 98 10 MAX603 20 MAX604 15 0 8 2 3 5 4 7 6 0.9 25 45 5 65 85 105 125 10 5 TEMPERATURE (C) 10Hz TO 10kHz OUTPUT NOISE 0 -55 -35 -15 5 25 45 65 9 8 10 11 12 6 DROPOUT VOLTAGE vs. LOAD CURRENT MAX604 VOUT = 3.3V 0.8 0.7 0.6 85 105 125 MAX603 VOUT = 5V 0.5 .2 0.4 0.3 R 0.2 ) ON ( DS =1 N) (O R DS 0 .65 =0 N) R DS(O = 0.4 MAX603, VOUT = 10V, SET EXTERNALLY 0.1 -55 -35 -15 12 2 SUPPLY VOLTAGE (V) 25 97 14 IQ 700 100 OUTPUT VOLTAGE vs. TEMPERATURE 103 16 04 , MAX6 1 10 1 MAX604, VOUT = 3.3V I Q, MA 0 100 TEMPERATURE (C) 200 300 400 500 600 700 LOAD CURRENT (mA) LINE-TRANSIENT RESPONSE OUTPUT NOISE (1mV/div) A B MAX603 VOUT = 5V tR = 10s, tF = 70s MAX603 VOUT = 5V 10ms/div 2ms/div A: VIN = 8V (HIGH), VIN = 7V (LOW) B: OUTPUT VOLTAGE (50mV/div) www.maximintegrated.com Maxim Integrated 4 MAX1603/4 TOC-03 MAX603/4-TOC-02 0.1 18 X603 3 UPWARD CURVE IS THERMAL EFFECT LOAD CURRENT (mA) MAX603/4-TOC-04 NORMALIZED OUTPUT VOLTAGE (%) 0 700 MAX604, VIN = 5.3V, VOUT = 3.3V 10 LOAD CURRENT (mA) 104 96 15 5 10 1 MAX603, VIN = 7V, VOUT = 5V 20 4 QUIESCENT CURRENT (A) VOUT = 3.3V, 5V, 10V QUIESCENT CURRENT (A) 0.97 MAX603, VIN = 12V, VOUT = 10V OUTPUT VOLTAGE (V) 0.98 20 22 MAX603, VOUT = 5V 5 MAX603/4-TOC-05 0.99 25 24 6 DROPOUT VOLTAGE (V) 1.00 30 QUIESCENT CURRENT (A) MAX603/4-TOC-01 NORMALIZED OUTPUT VOLTAGE 1.01 OUTPUT VOLTAGE AND QUIESCENT CURRENT vs. SUPPLY VOLTAGE QUIESCENT CURRENT vs. LOAD CURRENT MAX603/4-TOC-06 OUTPUT VOLTAGE vs. LOAD CURRENT MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Typical Operating Characteristics (continued) (VIN = 7V for MAX603, VIN = 5.3V for MAX604, OFF = VIN, SET = GND, CIN = COUT = 10F, RL = 1k, TJ = +25C, unless otherwise noted.) OVERSHOOT AND TIME EXITING SHUTDOWN MODE LOAD-TRANSIENT RESPONSE B 5V A A B MAX603 VOUT = 5V 0V 2ms/div 500s/div A: OFF PIN VOLTAGE (1V/div) RISE TIME = 13s B: MAX603 OUTPUT VOLTAGE (1V/div) DELAY = 4.936ms, OVERSHOOT = 1%, RISE TIME = 55s A: OUTPUT VOLTAGE (100mV/div) B: IOUT = 500mA (HIGH), IOUT = 5mA (LOW) Pin Description PIN NAME DESCRIPTION 1 IN 2, 3, 6, 7 GND Ground. These pins function as heatsinks, only in the SOIC package. All GND pins must be soldered to the circuit board for proper power dissipation. Connect to large copper pads or planes to channel heat from the IC. 4 OFF Shutdown, active low. Switch logic levels in less than 1s with the high level above the OFF threshold. 5 SET Feedback for Setting the Output Voltage. Connect to GND to set the output voltage to the preselected 3.3V or 5V. Connect to an external resistor network for adjustable output operation. 8 OUT Regulator Output. Fixed or adjustable from 1.25V to 11.0V. Sources up to 500mA for input voltages above 4V. Regulator Input. Supply voltage can range from 2.7V to 11.5V. 1 2 VIN 3 CIN 10F 4 IN MAX603 8 MAX604 OUT GND GND GND GND OFF SET VOUT 7 6 R1 5 COUT 10F RL R2 Figure 1. Test Circuit www.maximintegrated.com Maxim Integrated 5 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators IN SHUTDOWN ERROR AMP OFF MOSFET DRIVER WITH FOLDBACK CURRENT LIMIT REVERSE CURRENT PROTECTION P SHUTDOWN LOGIC OUT SET R1 THERMAL SENSOR 1.20V REFERENCE DUAL-MODE COMPARATOR GND 80mV R2 MAX603 MAX604 Figure 2. Functional Diagram Detailed Description The MAX603/MAX604 are low-dropout, low-quiescentcurrent linear regulators designed primarily for batterypowered applications. They supply an adjustable 1.25V to 11V output or a preselected 5V (MAX603) or 3.3V (MAX604) output for load currents up to P-channel. As illustrated in Figure 2, they consist of a 1.20V reference, error amplifier, MOSFET driver, P-channel pass transistor, dual-mode comparator, and internal feedback voltage divider. The 1.20V bandgap reference is connected to the error amplifier's inverting input. The error amplifier compares this reference with the selected feedback voltage and amplifies the difference. The MOSFET driver reads the error signal and applies the appropriate drive to the P-channel pass transistor. If the feedback voltage is lower than the reference, the pass transistor gate is pulled lower, allowing more current to pass and increasing the output voltage. If the feedback voltage is too high, the pass transistor gate is pulled up, allowing less current to pass to the output. www.maximintegrated.com The output voltage is fed back through either an internal resistor voltage divider connected to the OUT pin, or an external resistor network connected to the SET pin. The dual-mode comparator examines the SET voltage and selects the feedback path used. If SET is below 80mV, internal feedback is used and the output voltage is regulated to 5V for the MAX603 or 3.3V for the MAX604. Additional blocks include a foldback current limiter, reverse current protection, thermal sensor, and shutdown logic. Internal P-Channel Pass Transistor The MAX603/MAX604 feature a 500mA P-channel MOSFET pass transistor. This provides several advantages over similar designs using PNP pass transistors, including longer battery life. The P-channel MOSFET requires no base drive, which reduces quiescent current considerably. PNP based regulators waste considerable amounts of current in dropout when the pass transistor saturates. They also use high base-drive currents under large loads. The MAX603/ MAX604 do not suffer from these problems and consume only 15A of quiescent current under light and heavy loads, as well as in dropout. Maxim Integrated 6 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Output Voltage Selection The MAX603/MAX604 feature dual-mode operation. In preset voltage mode, the output of the MAX603 is set to 5V and the output of the MAX604 is set to 3.3V using internal, trimmed feedback resistors. Select this mode by connecting SET to ground. In adjustable mode, an output between 1.25V and 11V is selected using two external resistors connected as a voltage divider to SET (Figure 3). The output voltage is set by the following equation: MAX603 MAX604 CIN BATTERY 0.1F to 10F OUTPUT VOLTAGE OUT IN OFF R1 SET GND COUT 10F R2 RL R1 = VOUT VSET 1 + R2 where VSET = 1.20V. To simplify resistor selection: V = R1 R2 OUT - 1 V SET Since the input bias current at SET is nominally zero, large resistance values can be used for R1 and R2 to minimize power consumption without losing accuracy. Up to 1.5M is acceptable for R2. Since the VSET tolerance is less than 40mV, the output can be set using fixed resistors instead of trim pots. In preset voltage mode, impedances between SET and ground should be less than 10k. Otherwise, spurious conditions could cause the voltage at SET to exceed the 80mV dual-mode threshold. Shutdown A low input on the OFF pin shuts down the MAX603/ MAX604. In the off mode, the pass transistor, control circuit, reference, and all biases are turned off, reducing the supply current below 2A. OFF should be connected to IN for normal operation. Use a fast comparator, Schmitt trigger, or CMOS or TTL logic to drive the OFF pin in and out of shutdown. Rise times should be shorter than 1s. Do not use slow RC circuits, leave OFF open, or allow the input to linger between thresholds; these measures will prevent the output from jumping to the positive supply rail in response to an indeterminate input state. Since the OFF threshold varies with input supply voltage (see Electrical Characteristics), do not derive the drive voltage from 3.3V logic. With VIN at 11.5V, the high OFF logic level needs to be above 4V. Foldback Current Limiting The MAX603/MAX604 also include a foldback current limiter. It monitors and controls the pass transistor's gate voltage, estimating the output current and limiting it to 1.2A www.maximintegrated.com Figure 3. Adjustable Output Using External Feedback Resistors for output voltages above 0.8V and VIN - VOUT > 0.7V. For VIN - VOUT < 0.7V (dropout operation), there is no current limit. If the output voltage drops below 0.8V, implying a short-circuit condition, the output current is limited to 350mA. The output can be shorted to ground for one minute without damaging the device if the package can dissipate VIN x 350mA without exceeding TJ = +150C. Thermal Overload Protection Thermal overload protection limits total power dissipation in the MAX603/MAX604. When the junction temperature exceeds TJ = +160C, the thermal sensor sends a signal to the shutdown logic, turning off the pass transistor and allowing the IC to cool. The thermal sensor will turn the pass transistor on again after the IC's junction temperature cools by 10C, resulting in a pulsed output during thermal overload conditions. Thermal overload protection is designed to protect the MAX603/MAX604 in the event of fault conditions. For continual operation, the absolute maximum junction temperature rating of TJ = +150C should not be exceeded. Operating Region and Power Dissipation Maximum power dissipation of the MAX603/MAX604 depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the rate of air flow. The power dissipation across the device is P = IOUT (VIN - VOUT). The resulting maximum power dissipation is: (TJ - T A ) PMAX = ( + ) BA JB where (TJ - TA) is the temperature difference between the MAX603/MAX604 die junction and the surrounding air, JB Maxim Integrated 7 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators POWER DISSIPATION vs. GROUND PAD AREA MAX603, VOUT = 5V 8-PIN SO PACKAGE PAPER EPOXY BOARD SINGLE SIDED 1oz. COPPER TJ = +125C TA = +25C STILL AIR 1.3 1.2 1.1 1.0 0.2 1.3 1 6.5 10 65 500 400 300 200 100 0 20 (in2) 130 (cm2) 4 PLASTIC DIP OPERATING REGION AT TA = +25C TJ = +125C 5 6 COPPER GROUND PAD AREA The GND pins of the MAX603/MAX604 SOIC package perform the dual function of providing an electrical connection to ground and channeling heat away. Connect all GND pins to ground using a large pad or ground plane. Where this is impossible, place a copper plane on an adjacent layer. The pad should exceed the dimensions in Figure 4. Figure 4 assumes the IC is an 8-pin SOIC package, is soldered directly to the pad, has a +125C maximum junction temperature and a +25C ambient air temperature, and has no other heat sources. Use larger pad sizes for other packages, lower junction temperatures, higher ambient temperatures, or conditions where the IC is not soldered directly to the heat-sinking ground pad. The MAX603/MAX604 can regulate currents up to 500mA and operate with input voltages up to 11.5V, but not simultaneously. High output currents can only be sustained when input-output differential voltages are low, as shown www.maximintegrated.com 600 500 400 300 200 100 0 8 9 10 11 7 SUPPLY VOLTAGE (V) 12 MAX603/4-FIG-04A 13 MAXIMUM CONTINUOUS CURRENT LIMIT TYPICAL DROPOUT VOLTAGE LIMIT (or JC) is the thermal resistance of the package chosen, and BA is the thermal resistance through the printed circuit board, copper traces and other materials to the surrounding air. The 8-pin SOIC package for the MAX603/ MAX604 features a special lead frame with a lower thermal resistance and higher allowable power dissipation. The thermal resistance of this package is JB = 42C/W, compared with JB = 110C/W for an 8-pin plastic DIP package and JB = 125C/W for an 8-pin ceramic DIP package. CERAMIC DIP MAX604 700 MAXIMUM OUTPUT CURRENT (mA) Figure 4. Typical Maximum Power Dissipation vs. Ground Pad Size. MAXIMUM SUPPLY VOLTAGE LIMIT 1.4 HIGH-POWER SOIC 2 3 HIGH-POWER SOIC PLASTIC DIP OPERATING REGION AT TA = +25C TJ = +125C CERAMIC DIP 4 MAX603/4-FIG-04B 1.5 600 MAXIMUM SUPPLY VOLTAGE LIMIT 1.6 MAXIMUM CONTINUOUS CURRENT LIMIT TYPICAL DROPOUT VOLTAGE LIMIT POWER DISSIPATION (W) 1.7 MAX603 700 MAXIMUM OUTPUT CURRENT (mA) MAX603/4 FIG 4 1.8 MAXIMUM OUTPUT CURRENT vs. SUPPLY VOLTAGE 5 6 7 8 9 10 11 12 13 SUPPLY VOLTAGE (V) Figure 5. Power Operating Regions: Maximum Output Current vs. Differential Supply Voltage in Figure 5. Maximum power dissipation depends on packaging, board layout, temperature, and air flow. The maximum output current is: I OUT(max) = PMAX x (TJ - T A ) (VIN - VOUT ) x 100C where PMAX is derived from Figure 4. Reverse-Current Protection The MAX603/MAX604 has a unique protection scheme that limits reverse currents when the input voltage falls below the output. It monitors the voltages on IN and OUT Maxim Integrated 8 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators IN MAX603 MAX604 COUT 10F OFF CIN BATTERY OUTPUT VOLTAGE OUT GND POWER-SUPPLY REJECTION RATIO vs. FREQUENCY IOUT = 1mA 70 PSRR (dB) 60 50 40 30 20 10 0 VIN = 1Vp-p FOR f < 400kHz CIN = 0F COUT = 10F 100 101 102 104 105 106 FREQUENCY (Hz) Figure 7. Power-Supply Rejection Ratio vs. Ripple Frequency and switches the IC's substrate and power bus to the more positive of the two. The control circuitry can then remain functioning and turn the pass transistor off, limiting reverse currents back through the device. This feature allows a backup regulator or battery pack to maintain VOUT when the supply at IN fails. Reverse-current protection activates when the voltage on IN falls 6mV (20mV maximum) below the voltage on OUT. Before this happens, currents as high as several milliamperes can flow back through the device. After switchover, typical reverse currents are limited to 0.01A for as long as the condition exists. www.maximintegrated.com The MAX603/MAX604 exhibit 3mVP-P to 4mVP-P of noise during normal operation. This is negligible in most applications. When using the MAX603/MAX604 in applications that include analog-to-digital converters of greater than 12 bits, consider the ADC's power-supply rejection specifications. Refer to the output noise plot in the Typical Operating Characteristics. PSRR and Operation from Sources Other than Batteries IOUT = 100mA 103 Capacitor Selection and Regulator Stability Noise MAX603/4-FIG-06 80 Figure 6 illustrates the typical application for the MAX603/ MAX604. Normally, use 0.1F to 10F capacitors on the input and 10F on the output of the MAX603/MAX604. The larger input capacitor values provide better supply-noise rejection and line-transient response. Improve load-transient response, stability, and power-supply rejection by using large output capacitors. For stable operation over the full temperature range and with load currents up to 500mA, 10F is recommended. Using capacitors smaller than 3.3F can result in oscillation. SET Figure 6. 3.3V or 5V Linear-Regulator Application 90 Applications Information The MAX603/MAX604 are designed to deliver low dropout voltages and low quiescent currents in battery-powered systems. Achieving these objectives requires trading off power-supply noise rejection and swift response to supply variations and load transients. Power-supply rejection is 80dB at low frequencies and rolls off above 10Hz. As the frequency increases above 10kHz, the output capacitor is the major contributor to the rejection of powersupply noise (Figure 7). Do not use power supplies with ripple above 100kHz, especially when the ripple exceeds 100mVP-P. When operating from sources other than batteries, improved supply-noise rejection and transient response can be achieved by increasing the values of the input and output capacitors, and through passive filtering techniques. The Typical Operating Characteristics show the MAX603/MAX604 supply and load-transient responses. Transient Considerations The Typical Operating Characteristics show the MAX603/ MAX604 load-transient response. Two components of the output response can be observed on the load-transient graphs--a DC shift from the output impedance due to the different load currents, and the transient response. Typical transients for step changes in the load current from 5mA to 500mA are 0.2V. Increasing the output capacitor's value attenuates transient spikes. Maxim Integrated 9 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Input-Output (Dropout) Voltage A regulator's minimum input-output voltage differential, or dropout voltage, determines the lowest usable supply voltage. In battery-powered systems, this will determine the useful end-of-life battery voltage. Because the MAX603/ MAX604 use a P-channel MOSFET pass transistor, their dropout voltage is a function of rDS(ON) multiplied by the load current (see Electrical Characteristics). Quickly stepping up the input voltage from the dropout voltage can result in overshoot. This occurs when the pass transistor is fully on at dropout and the IC is not given time to respond to the supply voltage change. Prevent this by slowing the input voltage rise time. Chip Topography IN Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE OUTLINE CODE NO. LAND PATTERN NO. 8 PDIP P8+3 21-0043 -- 8 SOIC S8-7F 21-0041 90-0096 8 CDIP J8-3 -- - Ordering Information PART OUT 0.100" (2.54mm) TEMP. RANGE PIN-PACKAGE MAX603CPA 0C to +70C 8 Plastic DIP MAX603CSA 0C to +70C 8 SO MAX603C/D 0C to +70C Dice* MAX603EPA -40C to +85C 8 Plastic DIP MAX603ESA -40C to +85C 8 SO MAX603MSA/PR+T -55C to +125C 8 SO MAX604CPA 0C to +70C 8 Plastic DIP MAX604CSA 0C to +70C 8 SO MAX604C/D 0C to +70C Dice* MAX604EPA -40C to +85C 8 Plastic DIP MAX604ESA -40C to +85C 8 SO * Dice are tested at TA = +25C, DC parameters only. ** Contact factory for availability. OFF GND SET 0.104" (2.64mm) TRANSISTOR COUNT: 111 NO DIRECT SUBSTRATE CONNECTION. THE N-SUBSTRATE IS INTERNALLY SWITCHED BETWEEN THE MORE POSITIVE OF IN OR OUT. www.maximintegrated.com Maxim Integrated 10 MAX603/MAX604 5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators Revision History REVISION NUMBER REVISION DATE 0 9/94 Initial Release -- 1 4/17 Updated Ordering Information table 10 DESCRIPTION PAGES CHANGED For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. (c) 2017 Maxim Integrated Products, Inc. 11 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX603CPA+ MAX603CSA+ MAX603ESA+ MAX604CPA+ MAX604CSA+ MAX604ESA+ MAX603CSA+T MAX603EPA+ MAX603ESA+T MAX604CSA+T MAX604EPA+ MAX604ESA MAX604ESA+T MAX604ESA-T MAX603CSA-T MAX603CPA MAX603CSA MAX603ESA MAX603ESA-T MAX604CSA MAX604CSA-T