Semtech SC4524F

Description

The SC4524F is a constant frequency peak current-modestep-down switching regulator capable of producing 2Aoutput current from an input ranging from 3V to 18V. Theswitching frequency of the SC4524F is programmableup to 2MHz, allowing the use of small inductors andceramic capacitors for miniaturization, and high input/output conversion ratio. The SC4524F is suitable fornext generation XDSL modems, high-definition TVs andvarious point of load applications.Peak current-mode PWM control employed in theSC4524F achieves fast transient response with simple loopcompensation. Cycle-by-cycle current limiting and hiccupoverload protection reduces power dissipation duringoutput overload. Soft-start function reduces input startupcurrent and prevents the output from overshootingduring power-up.The SC4524F is available in SOIC-8 EDP package.

Features

Wide Input Voltage Range: 3V to 18V2A Output Current200kHz to 2MHz Programmable FrequencyPrecision 1V Feedback VoltagePeak Current-Mode ControlCycle-by-Cycle Current LimitingHiccup Overload Protection with Frequency FoldbackSoft-Start and EnableThermal ShutdownThermally Enhanced 8-pin SOIC PackageFully RoHS and WEEE Compliant

Remarks:Table 5. Recommended inductance (L1) and compensator (R7, C5, C8).

Typical applications

• XDSL and Cable Modems
• LCD and Plasma TVs
• DSP Power Supplies
• CPE Equipment
• Point of Load Applications
• Set Top Boxes

More information

• Datasheet
• IC product information