1FEATURES

2· Controlled Baseline

– One Assembly Site

– One Test Site

– One Fabrication Site

· Extended Temperature Performance of

–55°C to 125°C

· Enhanced Diminishing Manufacturing Sources

(DMS) Support

· Enhanced Product-Change Notification

· Qualification Pedigree (1)

· 60-mΩ MOSFET Switches for High Efficiency

at 3-A Continuous Output Source or Sink

Current

· Adjustable Output Voltage Down to 0.9 V With

1% Accuracy

· Externally Compensated for Design Flexibility

· 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

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

DESCRIPTION/ORDERING INFORMATION

As members of the SWIFT™ family of dc/dc regulators, the TPS54310 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 TPS54310 device is available in a thermally enhanced 20-pin TSSOP (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.