参数资料
型号: SC4525ASETRT
厂商: Semtech
文件页数: 1/19页
文件大小: 0K
描述: IC REG BUCK 3A 8SOIC
标准包装: 1
类型: 降压(降压)
输出数: 1
输入电压: 8 V ~ 28 V
PWM 型: 电流模式
频率 - 开关: 300kHz ~ 1.3MHz
电流 - 输出: 3A
同步整流器:
工作温度: -40°C ~ 125°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
产品目录页面: 1358 (CN2011-ZH PDF)
其它名称: SC4525ASEDKR
SC4525A
28V 3A Step-Down Switching Regulator
POWER MANAGEMENT
Features
Description
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Wide input range: 8V to 28V
3A 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 SC4525A is a constant frequency peak current-mode
step-down switching regulator capable of producing 3A
output current from an input ranging from 8V to 28V. The
switching frequency of the SC4525A is programmable
up to 2MHz, allowing the use of small inductors and
ceramic capacitors for miniaturization, and high input/
output conversion ratio. The SC4525A is suitable for
next generation XDSL modems, high-definition TVs and
various point of load applications.
Peak current-mode PWM control employed in the
SC4525A achieves fast transient response with simple loop
compensation. Cycle-by-cycle current limiting and hiccup
Applications
overload protection reduces power dissipation during
output overload. Soft-start function reduces input start-
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XDSL and Cable Modems
Set Top Boxes
Point of Load Applications
CPE Equipment
DSP Power Supplies
LCD and Plasma TVs
up current and prevents the output from overshooting
during power-up.
The SC4525A is available in SOIC-8 EDP package.
SC4525A
Typical Application Circuit
Efficiency
4.7 m F
V
IN
10V – 28V
C4
IN
SS/EN
SC4525A
BST
SW
D1
1N4148
C1
0.1 m F
L1
5.2 m H
R4
33.2k
OUT
5V/3A
90
80
70
V IN = 12V
V IN = 24V
FB
60
COMP
ROSC
GND
C7
10nF
C8
10pF
R7
24.3k
C5
1nF
R5
18.2k
D2
20BQ030
R6
8.25k
C2
10 m FX3
50
40
L1: Coiltronics CD1-5R2
C2: Murata GRM31CR60J106K
C4: Murata GRM32ER71H475K
0.0
0.5
1.0 1.5 2.0
Load Current (A)
2.5
3.0
Figure 1. 1MHz 10V -28V to 5V/3A Step-down Converter
Efficiency of the 1MHz 10V-28V to 5V/3A Step-Down Conve
November8,2007
 
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SC4525CSETRT 功能描述:IC REG BUCK ADJ 3A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压(降压) 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON(1.45x1) 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2
SC4525D 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:18V, 3A, 350kHz Step-Down Switching Regulator
SC4525DEVB 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:18V, 3A, 350kHz Step-Down Switching Regulator
SC4525DSETRT 功能描述:IC REG BUCK ADJ 3A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:升压(升压) 输出类型:两者兼有 输出数:1 输出电压:5V,2 V ~ 16.5 V 输入电压:2 V ~ 16.5 V PWM 型:- 频率 - 开关:45kHz 电流 - 输出:50mA 同步整流器:无 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP(0.300",7.62mm) 包装:管件 供应商设备封装:8-PDIP