• 60-mΩ MOSFET Switches for High Efficiency at 3-A Continuous Output Source or Sink Current
• Adjustable Output Voltage Down to 0.9 V With 1% Accuracy
• Externally Compensated for Design Flexibility
• Fast Transient Response
• Wide PWM Frequency: Fixed 350 kHz, 550  kHz, or Adjustable 280 kHz to 700 kHz
• Load Protected by Peak Current Limit and Thermal Shutdown
• Integrated Solution Reduces Board Area and Total Cost

• 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
• Portable Computing/Notebook PCs

As members of the SWIFT™ family of dc/dc regulators, the TPS54310 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 TPS54310 device is available in a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ 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.