SP6642EU SIPEX [Sipex Corporation], SP6642EU Datasheet

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SP6642EU

Manufacturer Part Number
SP6642EU
Description
Single Alkaline Cell, High Efficiency Step-Up DC-DC Converter
Manufacturer
SIPEX [Sipex Corporation]
Datasheet
1.SP6642EU.pdf (4 pages)
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 – 47 H Inductor
SP6642/6643APN/02
40mA Output Current for the SP6642/3
Single Cell to 2V to 5V Converter
High Efficiency: 81%
Twice the Output Current as the
Pin-to-Pin Compatible MAX1642/3
0.75V Start-up Voltage
SP6642/6643 Application Note
®
1
SP6642/3 40mA Output Application: Block Diagram
Single
Cell
High Current Output
Application Note:
SP6642/3
DC/DC Converter
SP6642/3
47 H
© Copyright 2000 Sipex Corporation
2 to 5V
Remotes,
Pagers,
Medical
Devices

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SP6642EU Summary of contents

Page 1

Output Current for the SP6642/3 Single Cell Converter High Efficiency: 81% Twice the Output Current as the Pin-to-Pin Compatible MAX1642/3 0.75V Start-up Voltage Description The SP6642/6643 devices are high-efficiency, low-power step-up DC-DC converters for +1V ...

Page 2

High Current Application Changing the inductor on the SP6642/3 from 100 will increase the peak inductor current by 2 times from about 250mA to about 500mA. This can be seen from the relationship of inductor current ...

Page 3

SP6642 Efficiency vs. Output Current 100 Vin = 1.6V 40 Vin = 1.2V 30 Vin = 1.0V 20 Vin = 0.85V 10 0 0.01 0.1 1 Output Current (mA) Figure 1. 2.4V Sumida 47 H ...

Page 4

... Model SP6642EU SP6643EU SP6642UEB Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office 233 South Hillview Drive ...

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