EVALUATION KIT AVAILABLE MAX710/MAX711 3.3V/5V or Adjustable, Step-Up/Down DC-DC Converters General Description Features The MAX710/MAX711 integrate a step-up DC-DC con- Step-Up/Down Voltage Conversion verter with a linear regulator to provide step-up/down +1.8V to +11V Input Range voltage conversion. They are optimized for battery applications where the input varies above and below Output: the regulated output voltage. They have an input range 5V/250mA at V = 1.8V IN from +1.8V to +11V. Typical efficiency when boosting 5V/500mA at V = 3.6V IN battery inputs is 85%. No External FETs Required The MAX710/MAX711 can be configured for minimum noise or optimum efficiency. Shutdown control turns off Load Disconnected from Input in Shutdown the part completely, disconnecting the input from the Battery Drain: output (I = 0.2A). Standby control turns off only SHDN 200A No-Load (V = 4V) the step-up converter and leaves the low-power linear IN 7A in Standby regulator active (I = 7A). Q 0.2A when Off The MAX710 has a preset 3.3V or 5V output voltage. The MAX711 has an adjustable output that can be set Low-Noise and High-Efficiency Modes from +2.7V to +5.5V with two resistors. Both devices come in 16-pin narrow SO packages. Applications Ordering Information Single-Cell, Lithium-Powered Portable Devices PART TEMP. RANGE PIN-PACKAGE Digital Cameras MAX710C/D 0C to +70C Dice 2- to 4-Cell AA Alkaline Hand-Held Equipment MAX710ESE -40C to +85C 16 Narrow SO 3.3V and Other Low-Voltage Systems MAX711C/D 0C to +70C Dice MAX711ESE -40C to +85C 16 Narrow SO 2-, 3-, and 4-Cell Battery-Powered Equipment Battery-Powered Devices with AC Input Adapters Typical Operating Circuit Pin Configuration Functional Diagrams +1.8V TO +11V TOP VIEW INPUT C1 N/E L1 LBI+ LBO LX 1 16 LX ON PGND 2 15 PGND OFF SHDN LX MAX710 ON ILIM 3 14 GND C2 STBY STBY SHDN 4 MAX710 13 REF PS 3.3V MAX711 5V 3/5 STBY 5 12 PS OUTPUT OUT 3.3V/5V 3/5 (FB) 6 11 LBI+ C4 LBI- N/E 7 10 LBI- LBO 8 9 OUT REF PGND GND ILIM C3 0.1F SO Pin Configurations appear at end of data sheet. ( ) IS FOR THE MAX711. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct 19-1254 Rev 0 7/97 at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com. AVAILABLEMAX710/MAX711 3.3V/5V or Adjustable, Step-Up/Down DC-DC Converters ABSOLUTE MAXIMUM RATINGS PS, LX, OUT to GND............................................-0.3V to +11.5V Continuous Power Dissipation (T = +70C) A ILIM, SHDN, STBY, FB, 3/5, N/E, LBO, SO (derate 8.70mW/C above +70C)..........................696mW LBI-, LBI+, REF to GND ...........................-0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C PS PGND to GND .......................................................-0.3V to +0.3V Storage Temperature Range .............................-65C to +160C REF Short Circuit to GND...........................................Continuous Junction Temperature......................................................+150C I ...................................................................................700mA Lead Temperature (soldering, 10sec) .............................+300C OUT 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 (V = 5.6V, STBY = PS, C = 0.1F, C = 4.7F, T = -40C to +85C, unless otherwise noted. Typical values are at PS REF OUT A T = +25C.) (Note 1) A PARAMETER CONDITIONS MIN TYP MAX UNITS N/E = PS 1.8 11.0 Input Voltage V N/E = GND (Note 2) 1.8 7.0 Full Load Start-Up Voltage 0.9 V T = 0C to +85C 4.8 5.0 5.2 A 3/5 = low, I = 0 to 250mA OUT T = -40C to +85C 4.6 5.0 5.3 A Output Voltage (MAX710) V T = 0C to +85C 3.17 3.3 3.43 3/5 = high, I = 0 to A OUT 250mA, V = 4.7V PS T = -40C to +85C 3.05 3.3 3.55 A Output Voltage-Adjustment Range MAX711 FB 5.5 V Output Voltage Load Regulation 0 < I < 250mA, STBY = PS 0.5 % OUT Output Voltage Line Regulation STBY = PS, 1.8V to 5V 0.3 %/V V = V = logic high, current measured STBY SHDN Quiescent Current 100 140 A into PS pin I = 0 LOAD Standby Quiescent Current V = 0V 7 16 A STBY Shutdown Quiescent Current V = 0V 0.1 5 A SHDN T = 0C to +85C, I = 0 1.24 1.28 1.31 A REF Reference Voltage V T = -40C to +85C, I = 0 1.23 1.28 1.32 A REF Standby Output Current V = 0V, linear regulator 10 mA STBY T = 0C to +85C 1.20 1.25 1.29 A FB Voltage MAX711, OUT = FB mV T = -40C to +85C 1.18 1.25 1.31 A 0mA I LOAD Load Regulation MAX711, OUT = FB 0.1 1 % 250mA FB Input Current FB = 1.25V 1 50 nA V = 5.6V 0.2 0.6 PS LX On-Resistance MAX710, V = 3.7V 0.3 0.9 PS MAX711, V = 2.7V 0.6 1.2 PS LX Leakage Current V = 5.6V 0.1 1 A LX ILIM = PS 0.5 0.8 1.3 LX Current Limit A ILIM = GND 1.1 1.5 1.95 2 Maxim Integrated