TPS54373 Datasheet | Texas Instruments

FEATURES D 60-mΩ MOSFET Switches for High Efficiency at 3-A Continuous Output Source or Sink Current D Disabled Current Sinking During Start-Up D Adjustable Output Voltage Down to 0.9 V With 1.0% Accuracy D Wide PWM Frequency: Fixed 350 k Hz, 550 k Hz or Adjustable 280 k Hz to 700 k Hz D Synchronizable to 700 k Hz D Load Protected by Peak Current Limit and Thermal Shutdown D Integrated Solution Reduces Board Area and ponent Count APPLICATIONS D Low-Voltage, High-Density Distributed Power Systems D Point of Load Regulation for High-Performance DSPs, FPGAs, ASICs, and Microprocessors D Broadband, Networking, and Optical munications Infrastructure D Power PC Series Processors DESCRIPTION As a member of the SWIFT™ family of dc/dc regulators, the TPS54373 low-input voltage, high-output current, synchronous buck PWM converter integrates all required active ponents. Included on the substrate with the listed features are a true, high-performance, voltage error amplifier that enables maximum performance and flexibility in choosing the output filter L and C ponents; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally or externally set slow-start circuit to limit in-rush currents; and a power-good output useful for processor/logic reset, fault signaling, and supply sequencing. For reliable power up in output precharge applications, the TPS54373 is designed to only source current during start-up. The TPS54373 is available in a thermally enhanced 20-pin TSSOP (PWP) Power PAD™ package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT™ designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles. TYPICAL APPLICATION - - I/O Supply BOOT PGND VBIAS VSENSE AGND P Core Supply 1 V/div START-UP WAVEFORM RL = 1 Ω VI = 3.3 V VO = 1.8 V - Optional 5.0 ms/div Please be aware that an important notice...