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Semtech SC4524C

28V 2A Step-Down Switching Regulator

Overview

TopologyOther Topology
Switching frequency230-1560 kHz
IC revision2.1

Description

The SC4524C is a constant frequency peak current-mode step-down switching regulator capable of producing 2A output current from an input ranging from 3V to 28V. The switching frequency of the SC4524C can be programmed up to 2MHz for component miniaturization or it can be set at lower frequencies to accommodate high step-down ratios. The SC4524C is suitable for next generation XDSL modems, high-definition TVs and various point of load applications.

Peak current-mode PWM control employed in the SC4524C 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 start-up current and prevents the output from overshooting during power-up.

The SC4524C is available in SOIC-8 EDP package.

Features

  • Wide input range: 3V to 28V
  • 2A 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

Remarks:

  • Refer page num 17 for more inductor values.

Typical applications

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

Products

Order Code Data­sheet Downloads Product seriesZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
Type Samples
742792116
STE ALT EAG CAD LTS PSP IGS CAD SPAWE-CBF SMT EMI Suppression Ferrite Bead 500 610 150 MHz 2500 0.06 High Current
Order Code Data­sheet
742792116
Samples
Order Code Data­sheet Downloads Product seriesZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
Type Samples