(0.7Vto3.5V)

21

23

VIN

PWM3

19

L2

L1

TI

Synchronous

Buck

Driver

PWM1

3

6

1

CS3

CS1

ILIM

17

RT

7

SS

15

GND

9

10

COMP

16

DROOP

4

2

CS4

CS2

FB

12

13

VOUT

GNDS

11

DIFFO

8

REF

22

BP5

5

CSCN

PGOOD

24

EN/SYNC

PWM2

20

PWM4

18

14

TI

Synchronous

Buck

Driver

BP5

TPS40090PW

TPS40090-Q1

SLUS845C

– JUNE 2008 – REVISED MAY 2011

www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

An output voltage droop can be programmed to improve the transient window and reduce size of the output filter.

Other features include a single voltage operation, a true differential sense amplifier, a programmable current

limit, soft-start, and a power good indicator.

ORDERABLE PART NUMBER

TOP-SIDE MARKING

–40°C to 125°C

TSSOP

– PW

Reel of 2000

TPS40090QPWRQ1

TPS40090Q

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

SIMPLIFIED TWO-PHASE APPLICATION DIAGRAM

2

Copyright

© 2008–2011, Texas Instruments Incorporated