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SP682

Sipex
Part Number SP682
Manufacturer Sipex
Description Micro Power Inverting Charge Pump
Published Jun 7, 2005
Detailed Description SP682 Corporation Micro Power Inverting Charge Pump ■ Low Power Voltage Conversion ■ +2.4V to +5.5V Input Range ■ 99% V...
Datasheet PDF File SP682 PDF File

SP682
SP682

Overview
SP682 Corporation Micro Power Inverting Charge Pump ■ Low Power Voltage Conversion ■ +2.
4V to +5.
5V Input Range ■ 99% Voltage Conversion Efficiency ■ Typical 60µA Supply Current ■ Requires Only Three External Capacitors ■ Includes Low Power Shutdown Option ■ Ideal in Portable Applications Such As Handheld Instruments Cellular Phones Personal Digital Assistants Laptops and Notebooks ■ Pin Compatible Upgrade to Microchip's TC682 C1- 1 C2+ 2 C2- 3 VOUT 4 8 SD SP682 8 Pin MSOP 7 C1+ 6 VCC 5 GND APPLICATIONS ■ LCD Display ■ Negative bias supply for op amps ■ Serial interface protocol circuits DESCRIPTION The SP682 is a monolithic charge pump voltage converter that produces a doubled, negative voltage from a single positive supply.
The SP682 charge pump outputs a –10V voltage from a +5V input.
Three external charge pump capacitors are required to support the voltage conversion and voltage doubling process.
An internal oscillator generates a 12kHz clock which cycles the internal switching that charges the storage and transfer capacitors.
The charge pump architecture is fabricated using a low power BiCMOS process technology.
The SP682 charge pump is ideal for low power applications requiring a typical +3V battery source such as a lithium cell.
Typical applications are handheld instruments, notebook and laptop computers, cellular phones, and data acquisition or GP systems.
The SP682 is packaged in either 8-pin NSOIC, 8-pin MSOP for surface mount applications, and 8 Pin PDIP.
TYPICAL APPLICATION CIRCUIT +2.
4V to +5V 1µF + 6 7 C1 1 2 C1– C2+ C1+ VCC VOUT 4 - VOUT COUT SP682 SD GND 5 8 C2 3 C2– Date: 5/20/04 SP682 Micro Power Inverting Charge Pump © Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied.
Exposure to absolute maximum rating conditions for extended perio...


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