1 Features

1• D-CAP2™ Mode Enables Fast Transient

Response

• Low-Output Ripple and Allows Ceramic Output

Capacitor

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

• Output Voltage Range: 0.76 V to 7 V

• Highly Efficient Integrated FETs Optimized

for Lower Duty Cycle Applications

– 100 mΩ (High-Side) and 70 mΩ (Low-Side)

• High Efficiency, Less Than 10 μA at shutdown SP•

High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Prebiased Soft Start

• 700-kHz Switching Frequency (fSW)

• Cycle-By-Cycle Overcurrent Limit

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 TPS54327 device is an adaptive on-time D-

CAP2™ mode synchronous buck converter.

TheTPS54327 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 TPS54327 uses the D-CAP2 mode control

which provides a fast transient response with no

external compensation components. The TPS54327

also has a proprietary circuit that enables the device

to adopt 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 VIN input. The

output voltage can be programmed between 0.76 V

and 7 V. The device also features an adjustable soft

start time. The TPS54327 is available in the 8-pin

DDA package and 10-pin DRC, and is designed to operate from –40°C to 85°C.