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The TPS60403DBVR device is a 60mA charge pump voltage inverter with a fixed 250kHz operating frequency that generates an unregulated negative output voltage from an input voltage of 1.6V to 5.5V.

Because of the wide input voltage range of the TPS60403DBVR device, two or three NiCd, NiMH or alkaline batteries and a Li-Ion battery can also be used to power it.

Only three external 1µF capacitors are required to build a complete DC-DC charge pump inverter. The entire converter is housed in a 5-pin SOT-23 package and can be built on a 50-mm 2 board area. Additional board area and component count reductions can be achieved by replacing the Schottky diodes typically required to boot to the load with an integrated circuit.

Over a wide output current range, the TPS60403DBVR device delivers a maximum output current of 60 mA with typical conversion efficiencies greater than 90%. The TPS60403DBVR device with variable switching frequency reduces operating current in applications with a wide load range and supports designs using low value capacitors.

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