Simplified Schematic

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82

84

86

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90

92

94

96

0

0.5

1

1.5

2

2.5

3

Load Current − A

VIN

PH

BOOT

PGND

VSENSE

Output

COMP

AGND

VBIAS

Input

TPS54310

Efficiency vs Load Current

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TPS54310

SLVS412E – DECEMBER 2001 – REVISED DECEMBER 2014

3-V to 6-V Input, 3-A Output Synchronous-Buck PWM Switcher With Integrated FETs

(SWIFT™)

1 Features

3 Description

As members of the SWIFT™ family of dc/dc

1

•

60-m

Ω MOSFET Switches for High Efficiency at

regulators, the TPS54310 low-input-voltage high-

3-A Continuous Output Source or Sink Current

output-current

synchronous-buck

PWM

converter

•

Adjustable Output Voltage Down to 0.9 V With 1%

integrates all required active components. Included

Accuracy

on the substrate with the listed features are a true,

high

performance,

voltage

error

amplifier

that

•

Externally Compensated for Design Flexibility

provides high performance under transient conditions;

•

Fast Transient Response

an undervoltage-lockout circuit to prevent start-up

•

Wide PWM Frequency: Fixed 350 kHz, 550 kHz,

until the input voltage reaches 3 V; an internally and

or Adjustable 280 kHz to 700 kHz

externally

set

slow-start

circuit

to

limit

in-rush

•

Load Protected by Peak Current Limit and

currents; and a power good output useful for

processor/logic reset, fault signaling, and supply

Thermal Shutdown

sequencing.

•

Integrated Solution Reduces Board Area and

Total Cost

The TPS54310 device is available in a thermally

enhanced

20-pin

HTSSOP

(PWP)

PowerPAD™

package,

which

eliminates

bulky

heatsinks.

TI

2 Applications

provides evaluation modules and the SWIFT designer

•

Low-Voltage, High-Density Systems With Power

software tool to aid in quickly achieving high-

Distributed at 5 V or 3.3 V

performance

power

supply

designs

to

meet

•

Point of Load Regulation for High

aggressive equipment development cycles.

Performance DSPs, FPGAs, ASICs, and

Device Information(1)

Microprocessors

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Broadband, Networking and Optical

HTSSOP

Communications Infrastructure

TPS54310

6.30 mm × 6.40 mm

PowerPAD (20)

•

Portable Computing/Notebook PCs

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.