Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump

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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.
MAX1595: Typical Operating Circuit MAX1595: Typical Operating Circuit Enlarge+

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


  • 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
Part NumberTopologyVIN
Unadj. VOUT
Oper. Freq.
Oper. Temp.
minmaxmaxtypSee Notes
MAX1595 Regulated1.85.50.22
-40 to +85
0 to +70
$1.61 @1k
See All Charge Pumps (45)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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