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Charge Pumps
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MAX1595
Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump
Data Sheet
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MyMaxim SubscriptionsDescription
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, high- efficiency auxiliary supply in applications that demand a compact design. The MAX1595 is offered in space-saving 8-pin µMAX® and high-power 12-pin TQFN packages.
Key Features
- Ultra-Small: Requires Only Three Ceramic Capacitors
- No Inductors Required
- Up to 125mA Output Current
- Regulated ±3% Output Voltage
- 1MHz Switching Frequency
- 1.8V to 5.5V Input Voltage
- 220µA Quiescent Current
- 0.1µA Shutdown Current
- Load Disconnect in Shutdown
Applications/Uses
- 3.3V to 5V Local Conversion Applications
- 3V to 5V GSM SIMM Cards
- Backup Battery Boost Converters
- Battery-Powered Applications
- Flash Memory Supplies
- Miniature Equipment
- PCMCIA Cards
- White LED Power
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