MAX682 Datasheet | Maxim Integrated

19-0177; Rev 1; 8/98 3.3V-Input to Regulated 5V-Output Charge Pumps General Description The MAX682/MAX683/MAX684 charge-pump regulators generate 5V from a 2.7V to 5.5V input. They are specifically designed to serve as high-efficiency auxiliary supplies in applications that demand a pact design. The MAX682, MAX683, and MAX684 deliver 250m A, 100m A, and 50m A output current, respectively. These plete 5V regulators require only one resistor and three external capacitors- no inductors are needed. High switching frequencies (externally adjustable up to 2MHz) and a unique regulation scheme allow the use of capacitors as small as 1µF per 100m A of output current. The MAX683/MAX684 are offered in a spacesaving 8-pin µMAX package that is only 1.1mm high, while the MAX682 is available in an 8-pin SO. Features o Ultra-Small: 1µF Capacitors per 100m A of Output Current o No Inductors Required o 1.1mm Height in µMAX Package (MAX683/MAX684) o Up to 250m A Output Current (MAX682) o Regulated ±4% Output Voltage o 50k Hz to 2MHz Adjustable Switching Frequency o 2.7V to 5.5V Input Voltage o 100µA Quiescent Current in Pulse-Skipping Mode o 0.1µA Shutdown Current MAX682/MAX683/MAX684 Applications Flash Memory Supplies Battery-Powered Applications Miniature Equipment PCMCIA Cards 3.3V to 5V Local Conversion Applications Backup-Battery Boost Converters 3V to 5V GSM SIMM Cards PART MAX682ESA MAX683EUA MAX684EUA Ordering Information TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 SO 8 µMAX 8 µMAX Typical Operating Circuit TOP VIEW CXN INPUT 2.7V TO 5.5V REXT CXP SKIP 1 8 7 Pin Configurations OUT CXP CXN PGND SKIP 1 SHDN IN 2 3 8 7 OUT CXP CXN PGND IN SKIP SHDN GND PGND OUT OUTPUT 5V/250m A SHDN IN 3 6 5 GND 4 GND 4 MAX683 MAX684 6 5 µMAX ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://.maxim-ic., or phone 1-800-998-8800. For...