Regulated 5V Charge Pump DC-DC Converter

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.

Applications

* 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

* 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