As members of the SWIFT family of dc/dc regulators, the TPS54317 low-input-voltage high-output-current synchronous-buck PWM converter integrates all required active components. Included on the substrate with the listed features are a true, high performance, voltage error amplifier that provides high performance under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally and 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.

The TPS54317 device is available in a thermally enhanced 24-pin QFN (RHF) PowerPAD package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in achieving high-performance power supply designs to meet aggressive equipment development cycles.

• 60-m MOSFET Switches for High Efficiency at 3-A Continuous Output Current
• Adjustable Output Voltage Down to 0.9 V With 1% Accuracy
• Switching Frequency: Adjustable From 280 kHz to 1600 kHz
• Externally Compensated for Design Flexibility
• Fast Transient Response
• Load Protected by Peak Current Limit and Thermal Shutdown
• Integrated Solution Reduces Board Area and Total Cost
• Spacing Saving 4mm x 5mm QFN Packaging
• For SWIFT Documentation, Application Notes, and Design Software, see the TI website at www.ti.com/swift
• APPLICATIONS
  • Low-Voltage, High-Density Systems With Power Distributed at 5 V or 3.3 V
  • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs, and Microprocessors
  • Broadband, Networking and Optical Communications Infrastructure