1 Features

1• D-CAP2™ Mode Control

– Fast Transient Response

– No External Parts Required for Loop

Compensation

– Compatible With Ceramic Output Capacitors

• High Initial Reference Accuracy (±1%)

• Low Output Ripple

• Wide Input Voltage Range: 4.5 V to 24 V

• Output Voltage Range: 0.76 V to 5.5 V

• Low-Side RDS(ON) Loss-Less Current Sensing

• Adaptive Gate Drivers with Integrated Boost Diode

• Adjustable Soft Start

• Non-Sinking Pre-Biased Soft Start

• 700-kHz Switching Frequency

• Cycle-by-Cycle Over-Current Limiting Control

• 30-mV to 300-mV OCP Threshold Voltage

• Thermally Compensated OCP by 4000 ppm/°C at

ITRIP

2 Applications

• Point-of-Load Regulation in Low Power Systems

for Wide Range of Applications

– Digital TV Power Supply

– Networking Home Pin

– Digital Set-Top Box (STB)

– DVD Player/Recorder

– Gaming Consoles

3 Description

The TPS53127 is a dual, adaptive on-time D-CAP2™

mode synchronous buck controller. The part enables system designers to cost effectively complete the

suite of various end equipment's power bus

regulators with a low external component count and

low standby consumption. The main control loop for

the TPS53127 uses the D-CAP2™ Mode topology which provides a very fast transient response with no

external component.

The TPS53127 also has a proprietary circuit that

enables the device to adapt not only low equivalent

series resistance (ESR) output capacitors such as

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 TPS53127 is available in the 24 pin RGE/PW

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

ambient temperature range.