19-2107; Rev 1; 8/02
Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump
General Description
The MAX1595 charge-pump regu...
19-2107; Rev 1; 8/02
Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump
General Description
The MAX1595 charge-pump
regulator generates either 3.3V or 5V from a 1.8V to 5.5V input. The unique control architecture allows the
regulator to step up or step down the input voltage to maintain output regulation. The 1MHz switching frequency, combined with a unique control scheme, allows the use of a ceramic capacitor as small as 1µF for 125mA of output current. The complete
regulator requires three external capacitors—no inductor is needed. The MAX1595 is specifically designed to serve as a high-power, highefficiency auxiliary supply in applications that demand a compact design. The MAX1595 is offered in spacesaving 8-pin µMAX and high-power 12-pin thin QFN packages.
Features
o Ultra-Small: Requires Only Three Ceramic Capacitors o No Inductors Required o Up to 125mA Output Current o Regulated ±3% Output Voltage o 1MHz Switching Frequency o 1.8V to 5.5V Input Voltage o 220µA Quiescent Current o 0.1µA Shutdown Current o Load Disconnect in Shutdown
MAX1595
Applications
White LED Power 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 MAX1595EUA33 MAX1595ETC33 MAX1595EUA50 PART MAX1595EUA33 MAX1595ETC33 MAX1595EUA50 MAX1595ETC50
Ordering Information
TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 µMAX 12 Thin QFN...