TPS40075

具有电压前馈的宽输入同步降压控制器

The is a mid voltage, wide input 4.5-V to 28-V,synchronous, step-down controller, offering design flexibility for a variety of user programmable functions, including; soft start, UVLO, operating frequency, voltage feed-forward and high-side FET sensed short circuit protection.

The TPS40075 drives external N-channel MOSFETs using second generation Predictive Gate Drive to minimize conduction in the body diode of the low side FET and maximize efficiency. Pre-biased outputs are supported by not allowing the low side FET to turn on until the voltage commanded by the closed loop soft start is greater than the pre-bias voltage. Voltage feed forward provides good response to input transients and provides a constant PWM gain over a wide input voltage operating range to ease compensation requirements. Programmable short circuit protection provides fault current limiting and hiccup recovery to minimize power dissipation with a shorted output. The 20-pin QFN package gives good thermal performance and a compact footprint.

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Operation Over 4.5-V to 28-V Input Range

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Fixed-Frequency Voltage-Mode Controller

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Integrated Unity Gain Amplifierfor Remote Output Sensing

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Predictive Gate Drive™ Generation II for Improved Efficiency

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<1% Internal 700-mV Reference

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Input Voltage Feed Forward Control

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Prebiased Output Compatible

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Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs

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Switching Frequency Programmable to 1 MHz

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20-Pin QFN Package

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Thermal Shutdown Protection

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Software Design Tool and EVM Available

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APPLICA ONS

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Power Modules

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Networking/Telecom

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Industrial

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Servers

Predictive Gate Drive is a trademark of Texas Instruments.