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-mΩ 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