LM828

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SNOS035D – MARCH 2010 – REVISED MAY 2013

LM828 Switched Capacitor Voltage Converter

Check for Samples: LM828

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FEATURES

DESCRIPTION

The LM828 CMOS charge-pump voltage converter

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•

Inverts Input Supply Voltage

inverts a positive voltage in the range of +1.8V to

•

SOT-23 Package

+5.5V to the corresponding negative voltage of

−1.8V

•

20

Ω Typical Output Impedance

to

−5.5V. The LM828 uses two low cost capacitors to

provide up to 25 mA of output current.

•

97% Typical Conversion Efficiency at 5 mA

The LM828 operates at 12 kHz switching frequency

APPLICATIONS

to reduce output resistance and voltage ripple. With

an operating current of only 40 µA (operating

•

Cellular Phones

efficiency greater than 96% with most loads), the

•

Pagers

LM828

provides

ideal

performance

for

battery

•

PDAs

powered systems. The device is in a tiny SOT-23

package.

•

Operational Amplifier Power Supplies

•

Interface Power Supplies

•

Handheld Instruments

Basic Application Circuits

Voltage Inverter

+5V to

−10V Converter

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PRODUCTION DATA information is current as of publication date.

Copyright © 2010–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.