1 Features

1• D-CAP2™ Mode Enables Fast Transient

Response

• Low Output Ripple and Allows Ceramic Output

Capacitor

• Wide 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

• High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Pre-Biased Soft Start

• 700-kHz Switching Frequency (fSW)

• Cycle-By-Cycle Overcurrent Limit

• Auto-Skip Eco-Mode™ for High Efficiency at Light

Load

2 Applications

• Wide Range of Applications for Low Voltage

Systems

– Digital TV Power Supplies

– High Definition Blu-ray Disc™ Players

– Networking Home Terminals

– Digital Set Top Boxes (STB)

3 Description

The TPS54328 is an adaptive on-time D-CAP2™

mode synchronous buck converter. The TPS54328

enables system designers to complete the suite of

various end-equipment power bus regulators with a

cost effective, low component count, low standby

current solution. The main control loop for the

TPS54328 uses the D-CAP2 mode control that

provides a fast transient response with no external

compensation components.

The adaptive on-time control supports seamless

transition between PWM mode at higher load

conditions and Eco-mode operation at light loads.

Eco-mode allows the TPS54328 to maintain high

efficiency during lighter load conditions. The

TPS54328 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

input (VIN).

The output voltage can be programmed from 0.76 V

to 7 V. The device also features an adjustable soft

start time. The TPS54328 is available in 8-pin DDA

and 10-pin DRC packages, and is designed to

operate over the ambient temperature range of –40°C

to 85°C.