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1-W Output (VCC . 4.5 V)

2.7-V to 9-V Input Operating Range

78% Typical Efficiency

160-kHz Fixed-Frequency Current-Mode

PWM Controller

EN Input Inhibits Operation and Reduces

Supply Current to 1 mA

Output Voltage Limited to M VOM 3 12 V– VCC

Soft Start

8-Pin SOIC and DIP Packages

–40°C to 85°C Free-Air Temperature Range

Pin-for-Pin Compatible with MAX755

description

The TPS6755 is an adjustable inverting dc/dc converter capable of operating from inputs as low as 2.7 V. The

only external components required are an inductor, an output filter capacitor, an input filter capacitor, a reference

filter capacitor, two resistors, and a Schottky rectifier. An enable input is provided to shut down the inverter when

an output voltage is not needed. The typical supply current is 1.9 mA at no-load and is further reduced to 1-mA

when the enable input is low.

The device features a 160-kHz current-mode pulse-width-modulation (PWM) controller with a p-channel

MOSFET power switch. The gate drive uses the converter output to reduce the die area needed to realize the

0.4-W MOSFET. Soft start is accomplished with the addition of one small capacitor at SS. A 1.22-V reference

is available for external loads up to 125 mA.

The TPS6755 is attractive for board-level dc/dc conversion in computer peripherals and in battery-powered

equipment requiring high efficiency and low supply current.

Available in an 8-pin DIP or an 8-pin SOIC package, the TPS6755 operates over a free-air temperature range

of –40°C to 85°C.