说明
The TPS4005x is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down controllers. The TPS4005x family offers design flexibility with a variety of user-programmable functions, including soft-start, UVLO, operating frequency, voltage feed- forward, high-side current limit, and loop compensation.
The TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range, and fast response to input line transients. Near-constant modulator gain with input variation eases loop compensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads.
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特性
- Operating Input Voltage 8 V to 40 V
- Input Voltage Feed-Forward Compensation
- < 1 % Internal 0.7-V Reference
- Programmable Fixed-Frequency Up to 1-MHz Voltage Mode Controller
- Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs
- 16-Pin PowerPAD Package (θJC= 2°C/W)
- Thermal Shutdown
- Externally Synchronizable
- Programmable High-Side Sense Short-Circuit Protection
- Programmable Closed-Loop Soft-Start
- TPS40054 Source Only
- TPS40055 Source/Sink
- TPS40057 Source/Sink With VOPrebias
