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Regulated 5V Charge Pump DC-DC Converter

Compact, Inductorless, Low-Profile 5V Backup Supply Fits in 0.1 Sq. Inch

Product Details

The MAX619 step-up charge-pump DC-DC converter delivers a regulated 5V ±4% output at 50mA over temperature. The input voltage range is 2V to 3.6V (two battery cells).

The complete MAX619 circuit fits into less than 0.1in² of board space because it requires only four external capacitors: two 0.22µF flying capacitors, and 10µF capacitors at the input and output.

Low operating supply current (150µA max) and low shutdown supply current (1µA max) make this device ideal for small, portable, and battery-powered applications. When shut down, the load is disconnected from the input.

The MAX619 is available in 8-pin DIP and SO packages.

Key Features

  • Regulated 5V ±4% Charge Pump
  • Output Current Guaranteed over Temperature
    • 20mA (VIN ≥ 2V)
    • 50mA (VIN, ≥ 3V)
  • 2V to 3.6V Input Range
  • No Inductors; Very Low EMI Noise
  • Ultra-Small Application Circuit (0.1in²)
  • Uses Small, Inexpensive Capacitors
  • 500kHz Internal Oscillator
  • Logic-Controlled 1µA Max Shutdown Supply Current
  • Shutdown Disconnects Load from Input
  • 8-Pin DIP and SO Packages

Applications/Uses

  • 5V Flash Memory Programmer
  • Battery-Powered Microprocessor-Based Systems
  • Compact 5V Op-Amp Supply
  • Local 3.3V to 5V Conversion
  • Minimum Component DC-DC Converters
  • Portable Instruments and Handy-Terminals
  • Regulated 5V Supply from Lithium Backup Battery
  • Remote Data-Acquisition Systems
  • Switching Drive Voltage for MOSFETs in Low-Voltage Systems
  • Two Battery Cells to 5V Conversion
Parametric specs for Charge Pumps
Topology Doubler
Regulated
VIN (V) (min) 2
VIN (V) (max) 3.6
IOUT (A) (typ) 0.05
Unadj. VOUT (V) 5
ICC (mA) (max) 0.17
Switching Frequency (kHz) 500
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
$1.68 @1k
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Simplified Block Diagram

MAX619: Typical Operating Circuit MAX619: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

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Description

The MAX619 evaluation kit (EV kit) is a 3V to 5V charge-pump DC-DC converter capable of driving loads up to 50mA. The circuit consists of the SOIC and four surface-mount capacitors on a single-layer printed circuit board.

View Details

Features

  • 2.0V to 3.6V Input Range
  • Up to 50mA Output Current
  • 1µA Shutdown Current

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Parameters

Parametric specs for Charge Pumps
Topology Doubler
Regulated
VIN (V) (min) 2
VIN (V) (max) 3.6
IOUT (A) (typ) 0.05
Unadj. VOUT (V) 5
ICC (mA) (max) 0.17
Switching Frequency (kHz) 500
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
$1.68 @1k

Key Features

  • Regulated 5V ±4% Charge Pump
  • Output Current Guaranteed over Temperature
    • 20mA (VIN ≥ 2V)
    • 50mA (VIN, ≥ 3V)
  • 2V to 3.6V Input Range
  • No Inductors; Very Low EMI Noise
  • Ultra-Small Application Circuit (0.1in²)
  • Uses Small, Inexpensive Capacitors
  • 500kHz Internal Oscillator
  • Logic-Controlled 1µA Max Shutdown Supply Current
  • Shutdown Disconnects Load from Input
  • 8-Pin DIP and SO Packages

Applications/Uses

  • 5V Flash Memory Programmer
  • Battery-Powered Microprocessor-Based Systems
  • Compact 5V Op-Amp Supply
  • Local 3.3V to 5V Conversion
  • Minimum Component DC-DC Converters
  • Portable Instruments and Handy-Terminals
  • Regulated 5V Supply from Lithium Backup Battery
  • Remote Data-Acquisition Systems
  • Switching Drive Voltage for MOSFETs in Low-Voltage Systems
  • Two Battery Cells to 5V Conversion

Description

The MAX619 step-up charge-pump DC-DC converter delivers a regulated 5V ±4% output at 50mA over temperature. The input voltage range is 2V to 3.6V (two battery cells).

The complete MAX619 circuit fits into less than 0.1in² of board space because it requires only four external capacitors: two 0.22µF flying capacitors, and 10µF capacitors at the input and output.

Low operating supply current (150µA max) and low shutdown supply current (1µA max) make this device ideal for small, portable, and battery-powered applications. When shut down, the load is disconnected from the input.

The MAX619 is available in 8-pin DIP and SO packages.

Simplified Block Diagram

MAX619: Typical Operating Circuit MAX619: 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