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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