ADI ADM8828ARTZ-REEL7

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 quiescent current to 20 nA. The ADM8828/ADM8829 is available in a 6- lead SOT- 23 package.

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

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