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.