ADM8829 Series

Switched Capacitor Voltage Inverter

Catalog

Switched Capacitor Voltage Inverter

Part	Package / Case	Output Type	Supplier Device Package	Voltage - Input (Min) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output	Mounting Type	Voltage - Input (Max) [Max]	Number of Outputs	Voltage - Output (Min/Fixed)	Output Configuration	Function	Synchronous Rectifier	Frequency - Switching
Analog Devices ADM8829ARTZ-REEL7	SOT-23-6	1.81 mOhm	SOT-23-6	1.5 V	85 °C	-40 °C	25 mA	Surface Mount	5.5 V	1	-Vin	Negative	Ratiometric		120 kHz

Catalog

Switched Capacitor Voltage Inverter

Key Features

• Inverts Input Supply Voltage

• 99% Voltage Conversion Efficiency

• 25 mA Output Current

• Shutdown Function

• Requires Only Two Capacitors

• 1 µF Capacitors

• 18ΩOutput Resistance

• +1.5 V to +5.5 V Input Range

• 600 µA Quiescent Current

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 quiescent current to 20 nA.The ADM8828/ADM8829 is available in a 6-lead SOT-23 package.ApplicationsHandheld InstrumentsLCD PanelsCellular PhonesPDAsRemote Data AcquisitionOp Amp Power Supplies