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廬

SP6642/3

Application Note:

High Current Output

s

40mA Output Current for the SP6642/3

Single Cell to 2V to 5V Converter

SP6642/3 40mA Output Application: Block Diagram

s

High Efficiency: 81%

s

Twice the Output Current as the

Pin-to-Pin Compatible MAX1642/3

Single

Cell

47碌H

SP6642/3

DC/DC Converter

2 to 5V

Pagers,

Remotes,

Medical

Devices

s

0.75V Start-up Voltage

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.

SP6642/6643 Applications Schematic 鈥?47碌H Inductor

SP6642/6643APN/02

SP6642/6643 Application Note

漏 Copyright 2000 Sipex Corporation

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