参数资料
型号: SC4524CSETRT
厂商: Semtech
文件页数: 1/22页
文件大小: 0K
描述: IC REG BUCK ADJ 2A 8SOIC
标准包装: 1
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 1 V ~ 26.88 V
输入电压: 3 V ~ 28 V
PWM 型: 电流模式
频率 - 开关: 300kHz ~ 1.3MHz
电流 - 输出: 2A
同步整流器:
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm Width)裸露焊盘
包装: 标准包装
供应商设备封装: 8-SOIC-EP
其它名称: SC4524CSEDKR
SC4524C
28V 2A Step-Down Switching Regulator
POWER MANAGEMENT
Features
Description
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Wide input range: 3V to 28V
2A Output Current
200kHz to 2MHz Programmable Frequency
Precision  V 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
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
Applications
compensation. Cycle-by-cycle current limiting and hiccup
overload protection reduces power dissipation during
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XDSL and Cable Modems
Set Top Boxes
Point of Load Applications
CPE Equipment
DSP Power Supplies
LCD and Plasma TVs
Automotive Car Audio
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.
Typical Application Circuit
S S 270 RE V 4
Efficiency
BST
IN
C5
V IN
10V – 28V
C4
2.2 F
SS/EN SC4524C
COMP ROSC GND
C7 R7 R5
10nF C8 28.0k 15.8k
22pF
2.2nF
SW
FB
D1
1N4148
C1
0.33 F
L1
8.2 H
D2
20BQ030
R4
42.2k
R6
10.5k
OUT
5V/2A
C2
22 F
90
85
80
75
70
65
60
55
50
45
V IN = 12V
V IN = 24V
40
L1: Coiltronics DR73-8R2
C2: Murata GRM31CR60J226K
C4: Murata GRM31CR71H225K
0
0.5 1
Load Current (A)
1.5
2
Figure 1. 1MHz 10V-28V to 5V/2A Step-down Converter
Rev. 2. 
? 20 3 Semtech Corporation  
F ig.1 E fficiency o f th e 1 M H z 1 0V -2 8V to 5 V /2A S tep -D o
相关PDF资料
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