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.