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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.