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SC4524FSETRT PDF预览

SC4524FSETRT

更新时间: 2024-11-24 01:11:35
品牌 Logo 应用领域
商升特 - SEMTECH /
页数 文件大小 规格书
23页 998K
描述
18V 2A Step-Down Switching Regulator

SC4524FSETRT 数据手册

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SC4524F  
18V 2A Step-Down Switching Regulator  
POWER MANAGEMENT  
Features  
Description  
Wide Input Voltage Range: 3V to 18V  
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  
The SC4524F is a constant frequency peak current-mode  
step-down switching regulator capable of producing 2A  
output current from an input ranging from 3V to 18V. The  
switching frequency of the SC4524F is programmable  
up to 2MHz, allowing the use of small inductors and  
ceramic capacitors for miniaturization, and high input/  
output conversion ratio. The SC4524F is suitable for  
next generation XDSL modems, high-definition TVs and  
various point of load applications.  
Thermal Shutdown  
Thermally Enhanced 8-pin SOIC Package  
Fully RoHS and WEEE Compliant  
Peak current-mode PWM control employed in the  
SC4524F 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.  
Applications  
XDSL and Cable Modems  
Set Top Boxes  
Point of Load Applications  
CPE Equipment  
DSP Power Supplies  
LCD and Plasma TVs  
The SC4524F is available in SOIC-8 EDP package.  
Typical Application Circuit  
Efficiency  
D 1  
10V – 16V  
90  
85  
80  
V
IN  
1N4148  
C 4  
2.2mF  
C 1  
0.33mF  
L1  
BST  
SW  
IN  
O UT  
VIN = 12V  
75  
6.8mH  
5V/2A  
R4  
SC4524F  
SS/EN  
70  
65  
60  
55  
102k  
FB  
CO M P  
RO SC  
R5  
G ND  
D2  
20BQ030  
R6  
25.5k  
C2  
22mF  
C 7  
10nF  
R7  
15.8k  
C8  
30.1k  
50  
45  
40  
10pF  
C 5  
1nF  
L1: W urth 744 778 9006  
C 2: M urata G RM 31CR 60J226K  
C4: M urata G RM 31CR61E225K  
0
0.5  
1
1.5  
2
Load Current (A)  
Figure 1 — 1MHz 10V-16V to 5V/2A Step-down Converter  
Rev. 2.0  
© 2013 Semtech Corporation  

SC4524FSETRT 替代型号

型号 品牌 替代类型 描述 数据表
SC4524DSETRT SEMTECH

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Switching Regulator, Current-mode, 4.3A, 1560kHz Switching Freq-Max, PDSO8, HALOGEN FREE A

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