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.