The TPS40077PWPG4 is a mid-voltage, wide-input (4.5-V to 28-V), synchronous, step-downcontroller, offering design flexibility for a variety of user-programmable functions, includingsoft start, undervoltage lockout (UVLO), operating frequency, voltage feed-forward, and high-side,FET-sensed, short-circuit protection.
The TPS40077PWPG4 drives external N-channel MOSFETs using second-generation, predictive-gatedrive 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 voltagecommanded by the closed-loop soft start is greater than the pre-bias voltage. Voltage feed-forwardprovides good response to input transients and provides a constant PWM gain over a wideinput-voltage operating range to ease compensation requirements. Programmable short-circuitprotection provides fault-current limiting and hiccup recovery to minimize power dissipation with ashorted output. The 16-pin PowerPAD package gives good thermal performance and a compactfootprint.
Feature
- 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
