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

Product

Folder

Sample &

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Technical

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Software

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Community

TPS53124

SLUS825C – FEBRUARY 2008 – REVISED AUGUST 2014

TPS53124 Dual Synchronous Step-Down Controller

For Low-Voltage Power Rails

1 Features

3 Description

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

1

•

High Efficiency, Low-Power Consumption

mode synchronous controller. The part enables

•

D-Cap Mode Enables Fast Transient Response

system designers to cost effectively complete the

•

High Initial Reference Accuracy

suite of digital TV power bus regulators with the

absolute lowest external component count and lowest

•

Low Output Ripple

standby consumption. The main control loop for the

•

Wide Input Voltage Range: 4.5 V to 24 V

TPS53124 uses the D-CAP™ mode that optimized

•

Output Voltage Range: 0.76 V to 5.5 V

for low ESR output capacitors such as POSCAP or

SP-CAP promises fast transient response with no

•

external

compensation.

The

part

provides

a

•

Adaptive Gate Drivers with Integrated Boost Diode

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

2 Applications

package and in the 28-pin PW package and is

•

Digital TV Power Supply

specified from -40°C to 85°C ambient temperature

range.

•

Networking Home Terminal

•

Digital STB

Device Information(1)

DEVICE NAME

PACKAGE

BODY SIZE

TPS53124

PW (28)

9.70 mm x 6.40 mm

TPS53124

QFN (24)

4.00 mm x 4.00 mm

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

the end of the datasheet.

4 Simplified Schematics

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.