GENERAL DESCRIPTION
The ADM8828/ADM8829 is a charge-pump voltage inverter which may be used to generate a negative supply from a positive input. Input voltages ranging from +1.5 V to +5.5 V can be inverted into a negative –1.5 V to –5.5 V output supply. This inverting scheme is ideal for generating a negative rail in single power-supply systems. Only two small external capacitors are needed for the charge pump. Output currents up to 25 mA with greater than 99% efficiency are achievable.
The ADM8828 also features a low power shutdown (SHDN) pin. This can be used to disable the device and reduce the quies cent current to 20 nA.
The ADM8828/ADM8829 is available in a 6-lead SOT-23 package.

FEATURES
   Inverts Input Supply Voltage
   99% Voltage Conversion Efficiency
   25 mA Output Current
   Shutdown Function
   Requires Only Two Capacitors
   1 mF Capacitors
   18 V Output Resistance
   +1.5 V to +5.5 V Input Range
   600 mA Quiescent Current
   20 nA Shutdown Current (ADM8828)

APPLICATIONS
   Handheld Instruments
   LCD Panels
   Cellular Phones
   PDAs
   Remote Data Acquisition
   Op Amp Power Supplies