Features

Wide input range: 3V to 28V

3A Output Current

200kHz to 2MHz Programmable Frequency

Precision 1V Feedback Voltage

Peak Current-Mode Control

Cycle-by-Cycle Current Limiting

Hiccup Overload Protection with Frequency Foldback

Soft-Start and Enable

Thermal Shutdown

Thermally Enhanced 8-pin SOIC Package

Fully RoHS and WEEE compliant

Applications

XDSL and Cable Modems

Set Top Boxes

Point of Load Applications

CPE Equipment

DSP Power Supplies

LCD and Plasma TVs

Automotive Car Audio

Description

The SC4525C is a constant frequency peak current-mode

step-down switching regulator capable of producing 3A

output current from an input ranging from 3V to 28V. The

switching frequency of the SC4525C can be programmed

up to 2MHz for component miniaturization or it can be

set at lower frequencies to accommodate high step-down

ratios. The SC4525C is suitable for next generation XDSL

modems, high-definition TVs and various point of load

applications.

Peak current-mode PWM control employed in the

SC4525C achieves fast transient response with simple loop

compensation. Cycle-by-cycle current limiting and hiccup

overload protection reduces power dissipation during

output overload. Soft-start function reduces input startup current and prevents the output from overshooting

during power-up.

The SC4525C is available in SOIC-8 EDP package.