As a member of the SWIFT family of dc/dc regulators, the TPS54917 low-input voltage high-output current synchronous buck PWM converter offers the same features as the TPS54910 in a smaller package and higher switching frequency, which allows for a smaller total solution. Included on the substrate with the listed features are a true, high performance, voltage error amplifier that enables maximum performance under transient conditions and flexibility in choosing the output filter L and C components; 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 TPS54917 is available in a thermally enhanced 34 pin QFN (RUV) PowerPAD package, which eliminates bulky heatsinks. TI provides evaluation modules and the SwitcherPro™ design software tool to aid in achieving high-performance power supply designs to meet aggressive equipment development cycles.

• 13-mΩ MOSFET Switches for High Efficiency at 9-A Continuous Output
• Adjustable Output Voltage Down to 0.9V With 1% Accuracy
• Externally Compensated for Design Flexibility
• Wide PWM Frequency: Fixed 350 kHz, 550 kHz, or Adjustable 280 kHz to 1.6 MHz
• Synchronizable to 1.6MHz
• Load Protected by Peak Current Limit and Thermal Shutdown
• Small 3.5mm x 7mm Package and Similar Layout to TPS54910 Reduces Board Area and Total Cost
• SWIFT Documentation Application Notes, and SwitcherPro Software: www.ti.com/swift
• APPLICATIONS
  • Low-Voltage, High-Density Systems With Power Distributed at 3.3 V
  • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs, and Microprocessors
  • Broadband, Networking and Optical Communications Infrastructure

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