TPS51386RJNR 4.5-V to 24-V input, 8-A synchronous buck converter

Features for the TPS51386

  • 4.5-V to 24-V input voltage range

  • 0.6-V to 5.5-V output voltage range

  • Integrated 22-mΩ and 11-mΩ MOSFETs

  • Support 8-A continuous I OUT

  • 84-µA low quiescent current

  • ±1% reference voltage (0.6 V) at 25°C

  • ±1.5% reference voltage (0.6 V) at –40°C to 125°C

  • 600-kHz switching frequency

  • D-CAP3™ control mode for fast transient response

  • Supports POSCAP and all MLCC output capacitor

  • Adjustable soft start and internal 1-ms soft start

  • Selectable PSM and Out-of-Audio™ (OOA) mode under light load and supports on-the-fly change

  • Large duty operation support

  • Power-good indicator to monitor output voltage

  • Latched output OV and UV protection

  • Non-latched UVLO and OT protection

  • Cycle-by-cycle overcurrent protection

  • Built-in output discharge feature

  • Small 2.00-mm × 3.00-mm HotRod™ QFN package

Description for the TPS51386

The TPS51386 is a monolithic, 8-A, synchronous buck converter with adaptive on-time D-CAP3 control mode. Integrated low R DS(on) power MOSFETs enable high efficiency and offer ease-of-use with minimum external component count for space-constrained power systems. Features include an accurate reference voltage, fast load transient response, auto-skip mode operation for light load efficiency, OOA light load operation with > 25-kHz switching frequency, D-CAP3 control mode with good line, load regulation, and does not require external compensation.

The TPS51386 provides complete protection OVP, UVP, OCP, OTP, and UVLO. The device is a combined power-good signal and output discharge function.

The TPS51386 supports both internal and external soft-start time option. The device has the internal fixed soft-start time 1 ms. If the application needs longer soft-start time, the external SS pin can be used to achieve longer soft-start time by connecting the external capacitor.

The TPS51386 are available in a thermally enhanced 12-pin QFN package and are designed to operate from –40°C to 125°C junction temperature.