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

Product Details

Key Features

Parametric specs for Charge Pumps
Topology Regulated
VIN (V) (min) 1.8
VIN (V) (max) 5.5
IOUT (A) (typ) 0.125
Unadj. VOUT (V) 5
ICC (mA) (max) 0.22
Switching Frequency (kHz) 1000
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins TQFN/12
UMAX/8
Budgetary
Price (See Notes)
1.71
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Simplified Block Diagram

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Parameters

Parametric specs for Charge Pumps
Topology Regulated
VIN (V) (min) 1.8
VIN (V) (max) 5.5
IOUT (A) (typ) 0.125
Unadj. VOUT (V) 5
ICC (mA) (max) 0.22
Switching Frequency (kHz) 1000
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins TQFN/12
UMAX/8
Budgetary
Price (See Notes)
1.71

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

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, 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.

Simplified Block Diagram

MAX1595: Typical Operating Circuit MAX1595: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .