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SP6642/6643APN/02

SP6642/6643 Application Note

© Copyright 2000 Sipex Corporation

SP6642/3

Application Note:

High Current Output

Description

The SP6642/6643 devices are high-efficiency, low-power step-up DC-DC converters for +1V

inputs ideal for single alkaline cell applications such as pagers, remote controls, pointing

devices and other low-power portable products. This application note is for users like medical

devices, emergency lighting and others who need twice the output current than the datasheet

specified values for the SP6642/6643. Typically specified at 20mA for 3.3V out with a 1.2V

input, the SP6642 can actually output double the current if a lower value of inductor is selected.

s 40mA Output Current for the SP6642/3

Single Cell to 2V to 5V Converter

Pin-to-Pin Compatible MAX1642/3

SP6642/6643 Applications Schematic – 47

µH Inductor

Single

Cell

47

µH

SP6642/3

DC/DC Converter

2 to 5V

Pagers,

Remotes,

Medical

Devices

SP6642/3 40mA Output Application: Block Diagram

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