1 Features

1• D-CAP2™ Mode Enables Fast Transient

Response

• Low Output Ripple and Allows Ceramic Output

Capacitor

• Wide VCC Input Voltage Range: 4.5 V to 18 V

• Wide VIN Input Voltage Range: 2.0 V to 18 V D•

Output Voltage Range: 0.76 V to 5.5 V

• Highly Efficient Integrated FET’s Optimized for

Lower Duty Cycle Applications – 120 mΩ (High

Side) and 70 mΩ (Low Side)

• High Efficiency, less than 10 μA at shutdown

• High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Pre-Biased Soft Start

• 700-kHz Switching Frequency (fSW)

• Cycle By Cycle Over Current Limit

• Power Good Output

2 Applications

• Wide Range of Applications for Low Voltage

System

– Digital TV Power Supply

– High Definition Blu-ray Disc™ Players

– Networking Home Terminal

– Digital Set Top Box (STB)

3 Description

The TPS54325 device is an adaptive on-time D-

CAP2™ mode synchronous buck converter. The

TPS54325 device enables system designers to

complete the suite of various end equipment’s power

bus regulators with a cost effective, low component

count, low standby current solution.

The main control loop for the TPS54325 uses the D•

CAP2™ mode control which provides a very fast

transient response with no external components. The

TPS54325 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 operates from 4.5-V to 18-V

VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The output voltage can be

programmed between 0.76 V and 5.5 V. The device

also features an adjustable slow start time and a

power good function. The TPS54325 is available in

the 14 pin HTSSOP package, and designed to operate from –40°C to 85°C.