General 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.

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

   Two Battery Cells to 5V Conversion

   Local 3V-to-5V Conversion

   Portable Instruments & Handy-Terminals

   Battery-Powered Microprocessor-Based Systems

   5V Flash Memory Programmer

   Minimum Component DC-DC Converters

   Remote Data-Acquisition Systems

   Compact 5V Op-Amp Supply

   Regulated 5V Supply from Lithium Backup Battery

   Switching Drive Voltage for MOSFETs in Low-Voltage Systems