1

FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION DIAGRAM

L2

SGND

TPS53124RGE

(QFN24)

DRVH2

VBST2

EN2

LL1

DRVL1

DRVH1

VBST1

EN1

PGND2

PGND1

DRVL2

LL2

C3

3.3uH

C9

C1

VO2

1.8V

C5

0.1uF

Input Voltage

PGND

1.05 V

4.7uF

C4

C6

Q4

3.3uH

PGND

Q3

R4

R5

R2

R1

C2

0.1uF

Q1

Q2

PGND

SGND

VO1

C7

4.7 uF

C8

1 uF

R6

R3

24

22

23

19

20

21

13

14

15

16

17

18

8

9

10

11

12

7

1

2

3

4

5

6

Power PAD

PGND

SGND

4.7uF

L1

TPS53124

Dual Synchronous Step-Down Controller For Low-Voltage Power Rails

2

• High Efficiency, Low-Power Consumption

• D-Cap Mode Enables Fast Transient Response

The TPS53124 is a dual, Adaptive on-time DCAP™

mode synchronous controller. The part enables

• High Initial Reference Accuracy

system designers to cost effectively complete the

• Low Output Ripple

suite of digital TV power bus regulators with the

• Wide Input Voltage Range: 4.5 V to 24 V

absolute lowest external component count and lowest

standby consumption. The main control loop for the

• Output Voltage Range: 0.76 V to 5.5 V

TPS53124 uses the D-CAP™ mode that optimized

• Low-Side R

for low ESR output capacitors such as POSCAP or

• Adaptive Gate Drivers with Integrated Boost

SP-CAP promises fast transient response with no

Diode

external

compensation.

The

part

provides

a

convenient and efficient operation with conversion

• Internal 1.2-ms Voltage-Servo Soft Start

voltages from 4.5 V to 24 V and output voltage from

• Built-In 5-V Linear Regulator

0.76 V to 5.5 V.

The TPS53124 is available in the 24-pin RGE

package and in the 28-pin PW package and is

• Digital TV Power Supply

specified from -40

°C to 85°C ambient temperature

• Networking Home Terminal

range.

• Digital STB

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

DCAP is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, 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.