1FEATURES
2• 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
• 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

DESCRIPTION
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.