LM828
www.ti.com SNOS035D – MARCH 2010 – REVISED MAY 2013 LM828 Switched Capacitor Voltage Converter
Check for Samples: LM828 FEATURES 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. 1 2 Inverts Input Supply Voltage
SOT-23 Package
20О© Typical Output Impedance
97% Typical Conversion Efficiency at 5 mA APPLICATIONS Cellular Phones
Pagers
PDAs
Operational Amplifier Power Supplies
Interface Power Supplies
Handheld Instruments The LM828 operates at 12 kHz switching frequency
to reduce output resistance and voltage ripple. With
an operating current of only 40 ВµA (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. Basic Application Circuits
Voltage Inverter +5V to -10V Converter 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. …
