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Semtech SC2440A

Dual 30V Step-Down Switching Regulator with 2A Switches

Overview

TopologyBuck Converter
Input voltage20-28 V
Output 13.3 V / 1.8 A
Output 25 V / 1.8 A
IC revision2.4

Description

(a) Synchronized 600kHz 24V to 5V and 3.3V Dual Step-down Converter.The free-running frequency of the regulator is set to 580kHz.(b) Efficiency(c) Switching Waveforms. VIN = 24V, IOUT1 = IOUT2 = 1A.(d) Start-up Waveforms. VIN = 24V, IOUT1 = IOUT2 = 0.5A.

Features

Wide Input Voltage Range: 2.8V to 30VTwo Integrated 2A SwitchesUp to 2.5MHz per Channel Programmable ConstantSwitching FrequencyOut of Phase Switching Reduces Input RippleBoth Switching Regulators share a single Input FilteringCapacitor, Reducing CostExternal SynchronizationCycle-by-Cycle Current-limitingIndependent Soft-Start/Enable PinsIndependent Hiccup Overload ProtectionPower Good Indicators Ease Output SequencingLow Shutdown CurrentThermally Enhanced 16-pin TSSOP Lead Free PackageFully WEEE and RoHS Compliant

Typical applications

  • XDSL and Cable Modems
  • Point of Load Applications
  • Security Cameras

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
744777910
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 10 2 2.6 45 49 26 7345 Robust
7447779112
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 12 1.82 2.4 50 58 23 7345 Robust
Order Code Data­sheet
744777910
7447779112
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples