TPS6755 ADJUSTABLE INVERTING DC/DC CONVERTER

SLVS155 - NOVEMBER 1996

features

• 1-W Output (V_CC >= 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 uA
• Output Voltage Limited to |V_O| <= 12 V- V_CC
• 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-uA 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- 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 uA.

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.

View more information about generic part numbers:TPS6755

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