1 Features
1• 60-mΩ, MOSFET Switches for High Efficiency at
3-A Continuous Output Source and Sink Current
• 0.9-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V Fixed
Output Voltage Devices With 1.0% Initial Accuracy
• Internally Compensated for Low Parts Count
• Fast Transient Response
• Wide PWM Frequency − Fixed 350 kHz, 550 kHz
or Adjustable 280 kHz to 700 kHz
• Load Protected by Peak Current Limit and
Thermal Shutdown
• Integrated Solution Reduces Board Area and
Total Cost

2 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
• Portable Computing/Notebook PCs

3 Description
As members of the SWIFT™ family of DC - DC
regulators, the TPS54311, TPS54312, TPS54313,
TPS54314, TPS54315 and TPS54316 low-input-
voltage high-outputcurrent synchronous-buck PWM
converters integrate 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 powergood output useful for
processor/logic reset, fault signaling, and supply
sequencing.
The TPS54311, TPS54312, TPS54313, TPS54314,
TPS54315 and TPS54316 devices are available in a
thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package, which eliminates bulky
heatsinks. TI provides evaluation modules and the
SWIFT designer software tool to aid in quickly
achieving high-performance power supply designs to
meet aggressive equipment development cycles.