1

2

3

4

16

15

14

13

PVDD2

BOOT2

SW2

PGND2

PVDD1

BOOT1

SW1

PGND1

TPS54290

5

6

7

12

11

10

BP

GND

FB2

EN1

EN2

FB1

V

OUT1

V

IN

UDG-09130

GND

8

9

COMP1

COMP2

V

OUT2

TPS54290, TPS54291, TPS54292

www.ti.com

SLUS973 – OCTOBER 2009

1.5-A/2.5-A Dual, Fully-Synchronous Buck Converter With Integrated MOSFET

Check for Samples :TPS54290 TPS54291 TPS54292

1

FEATURES

APPLICATIONS

•

Set Top Box

2

•

4.5 V to 18 V Input Range

•

Digital TV

•

•

Power for DSP

•

Fully Integrated Dual Buck, 1.5 A/2.5 A

•

Consumer Electronics

•

Three Fixed Switching Frequency Versions:

–

TPS54290 – 300 kHz

DESCRIPTION

–

TPS54291 – 600 kHz

TPS54290/1/2 is a dual output fully synchronous buck

–

TPS54292 – 1.2 MHz

converter capable of supporting applications with a

•

Integrated UVLO

minimal number of external components. It operates

from a 4.5 V to 18 V input supply voltage, and

•

supports output voltages as low as 0.8 V and as high

•

Internal Soft-Start

as 90% of the input voltage.

–

TPS54290 – 5.2 ms

Both high-side and low-side MOSFETs are integrated

–

TPS54291 – 2.6 ms

to provide fully synchronous conversion with higher

–

TPS54292 – 1.3 ms

efficiency. Channel1 can provide up to 1.5 A of

continuous current, meanwhile, Channel2 supports

•

Dual PWM Outputs 180° Out-of-Phase

up to 2.5 A.

•

Dedicated Enable for Each Channel

Current mode control simplifies the compensation.

•

Current Mode Control for Simplified

The external compensation adds flexibility for the

Compensation

user to choose different type of output capacitors.

•

External Compensation

180°

out-of-phase

operation

reduces

the

ripple

•

Pulse-by-Pulse Overcurrent Protection,

current through the input capacitor, providing the

2.2 A/3.8 A Overcurrent Limit

benefit of reducing input capacitance, alleviating EMI

•

Integrated Bootstrap Switch

and increasing capacitor life.

•

Thermal Shutdown Protection at 145°C

•

16-Pin PowerPAD™ HTSSOP Package

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

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, 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.