TPS40077

高效率，中端，输入，具有电压前馈同步降压控制器 HIGH-EFFICIENCY, MIDRANGE-INPUT, SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD

The is a midvoltage, 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 TPS40077 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 16-pin PowerPAD 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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Programmable, Fixed-Frequency, up to 1-MHz, Voltage-Mode Controller

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Predictive Gate Drive™ Anti-Cross-Conduction Circuitry

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<1% Internal 700-mV Reference

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

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16-Pin PowerPAD™ Package

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Thermal Shutdown Protection

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Pre-Bias Compatible

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Power-Stage Shutdown Capability

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Programmable High-Side Sense Short-Circuit Protection

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APPLICA ONS

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Power Modules

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Networking/Telecom

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PCI Express

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Industrial

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Servers

Predictive Gate Drive, PowerPAD are trademarks of Texas Instruments.

All other trademarks are the property of their respective owners.