TPS53125

www.ti.com

SLVS947A – OCTOBER 2009 – REVISED OCTOBER 2009

DUAL SYNCHRONOUS STEP-DOWN CONTROLLER

FOR LOW VOLTAGE POWER RAILS

Check for Samples: TPS53125

1

FEATURES

APPLICATIONS

•

Point-of-Load Regulation in Low Power

2

•

D-CAP2™ Mode Control

Systems for Wide Range of Applications

–

Fast Transient Response

–

Digital TV Power Supply

–

No External Parts Required for Loop

–

Networking Home Terminal

Compensation

–

Digital Set-Top Box (STB)

–

Compatible With Ceramic Output

–

DVD Player/Recorder

Capacitors

–

Gaming Consoles

•

High Initial Reference Accuracy (±1%)

•

Low Output Ripple

DESCRIPTION

•

Wide Input Voltage Range:4.5 V to 24 V

The TPS53125 is a dual, adaptive on-time D-CAP2™

•

Output Voltage Range: 0.76 V to 5.5 V

mode synchronous buck controller. The part enables

•

system designers to cost effectively complete the

suite

of

various

end

equipment's

power

bus

•

Adaptive Gate Drivers with Integrated Boost

regulators with a low external component count and

Diode

low standby consumption. The main control loop for

•

Adjustable Soft Start

the TPS53125 uses the D-CAP2™ Mode topology

•

Non-Sinking Pre-Biased Soft Start

which provides a very fast transient response with no

external component.

•

350-kHz Switching Frequency

The TPS53125/7 also has a proprietary circuit that

•

Cycle-by-Cycle Over-Current Limiting Control

enables the device to adapt not only low equivalent

•

30-mV to 300-mV OCP Threshold Voltage

series resistance (ESR) output capacitors such as

•

Thermally Compensated OCP by 4000 ppm/°C

POSCAP/SP-CAP, but also ceramic capacitor. The

part provides a convenient and efficient operation

with conversion voltages from 4.5 V to 24 V and

output voltage from 0.76 V to 5.5 V.

The TPS53125 is available in the 24 pin RGE/PW

package, and is specified from –40°C to 85°C

ambient temperature range.

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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

D-CAP2 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.