6,4 mm X 9,7 mm

Typical Size

1

FEATURES

DESCRIPTION

APPLICATIONS

PVIN

PH

BOOT

PGND

VSENSE

Output

COMP

AGND

VBIAS

Voltage

Input1

TPS54073

*

*

*

TYPICAL APPLICATION

R =1.5

L

W

V

=1.5V

(core)

t-Time-5ms/div

START-UP WAVEFORM

WITH3PRECHARGEDIODES

VIN

Voltage

Input2

TPS54073

2.2 – 4 -V, 14-A SYNCHRONOUS BUCK CONVERTER

WITH DISABLED SINKING DURING START-UP

2

• 8-mΩ MOSFET Switches for High Efficiency at

14.5-A Peak Output Current

As a member of the SWIFT™family of dc/dc

regulators,

the

TPS54073

low-input

voltage

• Separate Low-Voltage Power Bus

high-output

current

synchronous

buck

PWM

• Disabled Current Sinking During Start-Up

converter integrates all required active components.

• Adjustable Output Voltage Down to 0.9 V

Included on the substrate with the listed features are

• Wide PWM Frequency: Fixed 350 kHz, 550 kHz

a true, high performance, voltage error amplifier that

enables maximum performance and flexibility in

or Adjustable 280 kHz to 700 kHz

choosing the output filter L and C components; an

• Synchronizable to 700 kHz

undervoltage-lockout circuit to prevent start-up until

• Load Protected by Peak Current Limit and

the input voltage reaches 3 V; an internally or

Thermal Shutdown

externally

set

slow-start

circuit

to

limit

in-rush

currents; and a power good output useful for

• Integrated Solution Reduces Board Area and

processor/logic reset, fault signaling, and supply

Total Cost

sequencing.

For

reliable

power

up

in

output

precharge

applications, the TPS54073 is designed to only

• Low-Voltage, High-Density Distributed Power

source current during start-up.

Systems

• Point of Load Regulation for High-

The TPS54073 is available in a thermally enhanced

Performance DSPs, FPGAs, ASICs, and

28-pin TSSOP (PWP) PowerPAD™ package, which

Microprocessors

eliminates bulky heatsinks. TI provides evaluation

• Broadband, Networking, and Optical

modules and the SWIFT™ designer software tool to

Communications Infrastructure

aid in quickly achieving high-performance power

supply

designs

to

meet

aggressive

equipment

• Power PC Series Processors

development cycles

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

SWIFT, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.