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1 Features

1? 13-mΩ MOSFET Switches for High Efficiency at

9-A Continuous Output

? Adjustable Output Voltage Down to 0.9 V 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 1.6 MHz

? Load Protected by Peak Current Limit and

Thermal Shutdown

? Small 3.5 mm x 7 mm Package and Similar

Layout to TPS54910 Reduces Board Area and

Total Cost

? SWIFT Documentation Application Notes, and

SwitcherPro? Software: www.ti.com/swift

2 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

3 Description

As a member of the SWIFT? family of DC-DC

regulators, the TPS54917 low-input voltage highoutput

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 (UVLO) 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 or logic reset, fault signaling, and

supply sequencing.

The TPS54917 is available in a thermally enhanced

34-pin VQFN (RUV) PowerPAD? package, which

eliminates bulky heat sinks. 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.