Programmable Frequency, 2A Output 30V Step-Down Switching Regulator
POWER MANAGEMENT Description
The SC4524 is an adjust...
Programmable Frequency, 2A Output 30V Step-Down Switching
Regulator
POWER MANAGEMENT Description
The SC4524 is an adjustable frequency peak currentmode step-down switching
regulator with an integrated 2.3A, 30V switch. The SC4524 can be programmed up to 1.5MHz. This allows the use of small inductor and ceramic capacitors, resulting in very compact power supplies. The SC4524 is suitable for next generation XDSL modems, set-top boxes and point of load applications.
SC4524
Features
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Up to 1.5 MHz Programmable Switching Frequency 2.3A Integrated Switch Wide Input Voltage Range 2.8V to 30V Peak Current-Mode Control with Cycle-by-Cycle Current Limiting Hiccup Overload Protection Soft-Start and Enable Thermal Shutdown Thermally Enhanced 8-Pin SOIC Package Fully WEEE and RoHS Compliant
u u u The SC4524 uses peak current-mode PWM control for www.DataSheet4U.com ease of compensation. Cycle-by-cycle current limit and u hiccup overload protection reduce power dissipation u
during overload. Combined soft start and enable pin not only eliminates output start up overshoot but also allows power sequencing. The SC4524 is available in SOIC-8 EDP package.
Applications
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XDSL and Cable Modems Set-top Boxes Point of Load Applications CPE Equipment DSP Power Supplies Disk Drives
Typical Application Circuit
Efficiency
90
V IN
24V
85
IN
D1
SS
C7 22nF
BST
Efficiency (%)
C2 1N4148 0.1 mF L1
80
OUT 5V/2A R1 22.1k
SC4524
COMP
SW
75 70 65 60 55
4.7 mH
FB
C6 22pF
R5 15....