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.