The ADM8828/ADM8829ARTZ-REEL 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/ADM8829ARTZ-REEL is available in a 6-lead SOT-23 package.
Feature
- 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
Applications
- Handheld Instruments
- LCD Panels
- Cellular Phones
- PDAs
- Remote Data Acquisition
- Op Amp Power Supplies
