SNOS035D – MARCH 2010 – REVISED MAY 2013
LM828 Switched Capacitor Voltage Converter
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FEATURES
Inverts Input Supply Voltage
SOT-23 Package
20Ω Typical Output Impedance
97% Typical Conversion Efficiency at 5 mA
DESCRIPTION
The LM828 CMOS charge-pump voltage converter
inverts a positive voltage in the range of +1.8V to
+5.5V to the corresponding negative voltage of
−1.8V
to
−5.5V.
The LM828 uses two low cost capacitors to
provide up to 25 mA of output current.
The LM828 operates at 12 kHz switching frequency
to reduce output resistance and voltage ripple. With
an operating current of only 40 µA (operating
efficiency greater than 96% with most loads), the
LM828 provides ideal performance for battery
powered systems. The device is in a tiny SOT-23
package.
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APPLICATIONS
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Cellular Phones
Pagers
PDAs
Operational Amplifier Power Supplies
Interface Power Supplies
Handheld Instruments
Basic Application Circuits
Voltage Inverter
+5V to
−10V
Converter
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Copyright © 2010–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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