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Home » NEWEST Products » New by Manufacturer » Texas Instruments » TPS54478 Synchronous Step-Down Converter - TI
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Texas Instruments TPS54478 Synchronous Step-Down Switcher

Texas Instruments TPS54478 Synchronous
Step-Down Switcher

The Texas Instruments TPS54478 is a full-featured 6V, 4A synchronous step-down current mode converter with two integrated MOSFETs. The TI TPS54478 step-down switcher features two 30mΩ MOSFETs for high efficiency at 4A loads and provides 200kHz to 2MHz switching frequency. This TI step-down current mode converter provides accurate regulation for a variety of loads with an accurate ±1% Voltage Reference (VREF) over temperature. The TI TPS54478 step-down switcher is designed for use in low-voltage, high-density power systems and point of load regulation for high performance DSPs, FPGAs, ASICs, and microprocessors.

Features
  • Two 30-mΩ (typical) MOSFETs for High Efficiency at 4 A Loads
  • 200kHz to 2MHz Switching Frequency
  • 0.6V ± 1% Voltage Reference Over Temperature (-40°C to 150°C)
  • Start up with Pre-Biased Voltage
  • Synchronizes to External Clock
  • Adjustable Slow Start / Sequencing
  • UV and OV Power Good Output
  • Cycle by Cycle Current Limit and Hiccup Current Protection
  • Thermally Enhanced 3mm × 3mm 16-pin QFN (RTE)
  • Pin Compatible to TPS54418
Applications
  • Low-Voltage, High-Density Power Systems
  • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
  • Broadband, Networking and Optical Communications Infrastructure

Schematic

Schematic

Block Diagram

Block Diagram
  • Texas Instruments
  • Power Management
  • Semiconductors|Integrated Circuits|IC-Power Management