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

• Internal 1.2 ms Voltage-Servo Soft Start

• Pre-Biased Soft Start

• Selectable Switching Frequency: 350 kHz / 700

kHz

• 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 Terminal

– Digital Set Top Box (STB)

– DVD Player/Recorder

– Gaming Consoles and Other

3 Description

The TPS53126 is a dual, adaptive on-time, D-

CAP2™ mode synchronous Buck controller. The TPS53126 enables system designers to complete the

suite of various end equipment's power bus

regulators with a cost effective, low external

component count, and low standby current solution.

The main control loop for the TPS53126 uses the D- CAP2™ mode control which provides a very fast

transient response with no external components. The

TPS53126 also has a proprietary circuit that enables

the device to adapt to both low equivalent series resistance (ESR) output capacitors, such as

POSCAP or SP-CAP, and ultra-low ESR ceramic

capacitors. The device provides convenient and

efficient operation with input voltages from 4.5 V to 24

V and output voltages from 0.76 V to 5.5 V.

The TPS53126 is available in 4mm x 4mm 24 pin

VQFN (RGE) or 24 pin TSSOP (PW) packages and is specified from –40°C to 85°C ambient temperature

range.