LM2682M Datasheet

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LM2682 Switched Capacitor Voltage Doubling Inverter

November 1999

LM2682

Switched Capacitor Voltage Doubling Inverter

General Description

The LM2682 is a CMOS charge-pump voltage inverter ca-

pable of converting positive voltage in the range of +2.0V to

+5.5V to the corresponding doubled negative voltage of

鈭?.0V to 鈭?1.0V respectively. The LM2682 uses three low

cost capacitors to provide 10 mA of output current without

the cost, size, and EMI related to inductor based circuits.

With an operating current of only 150 碌A and an operating ef-

ficiency greater than 90% with most loads, the LM2682 pro-

vides ideal performance for battery powered systems. The

LM2682 offers a switching frequency of 6 kHz.

Features

n

n

n

n

Inverts then doubles input supply voltage

Small MSOP-8 package (mini SO-8) and SO-8 package

90鈩?typical output impedance

94% typical power efficiency at 10 mA

Applications

n

n

n

n

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LCD contrast biasing

GaAs power amplifier biasing

Interface power supplies

Handheld instrumentation

Laptop computers and PDAs

Typical Operating Circuit and Pin Configuration

8-Pin MSOP

or 8-Pin SOIC

DS100997-2

DS100997-1

Ordering Information

Order Number

LM2682MM

LM2682MMX

LM2682M

LM2682MX

Package

MSOP-8

MSOP-8

SO-8

SO-8

Package Number

MUA08A

MUA08A

M08A

M08A

Package Marking

S11A

S11A

LM2682M

LM2682M

Supplied As

Tape and Reel (1000 units/reel)

Tape and Reel (3500 units/reel)

Rail (95 units/rail)

Tape and Reel (2500 units/reel)

漏 1999 National Semiconductor Corporation

DS100997

www.national.com

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