The TPS40077 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.
● Operation Over 4.5-V to 28-V Input Range
● Programmable, Fixed-Frequency, up to 1-MHz, Voltage-Mode Controller
● Predictive Gate Drive™ Anti-Cross-Conduction Circuitry
● <1% Internal 700-mV Reference
● Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs
● 16-Pin PowerPAD™ Package
● Thermal Shutdown Protection
● Pre-Bias Compatible
● Power-Stage Shutdown Capability
● Programmable High-Side Sense Short-Circuit Protection
● APPLICATIONS
● Power Modules
● Networking/Telecom
● PCI Express
● Industrial
● Servers
●Predictive Gate Drive, PowerPAD are trademarks of Texas Instruments.
●All other trademarks are the property of their respective owners.
