Automotive, unregulated 200mA charge pump voltage inverter | DRL | 6 | -40 to 125

The TPS60800-Q1 generates an unregulated negative

output voltage from an input voltage ranging from 1.8V to 5.25V. The devices are

typically supplied by a preregulated supply rail of 5V or 3.3V. As TPS60800-Q1

supports wide input voltage range, two or three NiCd, NiMH, or alkaline battery

cells, as well as one Li-Ion cell can also power the device.

Only three external 1µF capacitors are required to

build a complete DC-DC charge pump inverter. Assembled in a 6-pin SOT563 package,

the complete converter can be built on a 40mm2 board area. Additional board area and

component count reduction is achieved by replacing the Schottky diode that is

typically needed for start-up into load by integrated circuitry.

The TPS60800-Q1 can deliver a maximum output

current of 200mA with a typical conversion efficiency of greater than 90% over a

wide output current range. TPS60800-Q1 comes with a variable switching frequency to

reduce operating current in applications with a wide load range and enables the

design with low-value capacitors.