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Semtech SC4524F

18V 2A Step-Down Switching Regulator

Overview

TopologyBuck Converter
Input voltage10-16 V
Switching frequency200-2000 kHz
Output 15 V / 1 A
IC revision2.0

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

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

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
7447789006SPEC
7 files WE-PD SMT Power Inductor 6.8 2.5 2.75 42 44 38 7332 Robust
Order Code Data­sheet
7447789006SPEC
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples