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SC4525AEVB

更新时间： 2024-11-23 04:05:23

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器开关
页数	文件大小	规格书
19页	781K
描述
28V 3A Step-Down Switching Regulator

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中文翻译

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数据手册

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SC4525AEVB 数据手册

SC4525A

28V 3A Step-Down Switching Regulator

POWER MANAGEMENT

Features

Description



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

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.

Thermally Enhanced 8-pin SOIC Package

Fully RoHS and WEEE compliant

Peak current-mode PWM control employed in the

SC4525Aachievesfasttransientresponsewithsimpleloop

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 SC4525A is available in SOIC-8 EDP package.

Typical Application Circuit

Efficiency

10V – 28V

1N4148

0.1mF

4.7mF

V_IN= 24V

V_IN= 12V

BST

OUT

5V/3A

5.2mH

SC4525A

SS/EN

33.2k

GND

COMP

ROSC

20BQ030

8.25k

10mFX3

10nF

24.3k

18.2k

10pF

1nF

0.0

0.5

1.0

1.5

2.0

2.5

3.0

L1: Coiltronics CD1-5R2

C2: Murata GRM31CR60J106K

C4: Murata GRM32ER71H475K

Load Current (A)

Figure 1. 1MHz 10V -28V to 5V/3A Step-down Converter

November 8, 2007

ꢀ

12 3 4 5 6 7...19

中文翻译

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与SC4525AEVB相关器件

型号	品牌	获取价格	描述	数据表
SC4525ASETRT	SEMTECH	获取价格	28V 3A Step-Down Switching Regulator
SC4525C	SEMTECH	获取价格	28V 3A Step-Down Switching Regulator Thermal Shutdown
SC4525CSETRT	SEMTECH	获取价格	Switching Regulator, Current-mode, 6.6A, 1560kHz Switching Freq-Max, PDSO8, HALOGEN FREE A
SC4525D	SEMTECH	获取价格	18V, 3A, 350kHz Step-Down Switching Regulator
SC4525DEVB	SEMTECH	获取价格	18V, 3A, 350kHz Step-Down Switching Regulator
SC4525DSETRT	SEMTECH	获取价格	18V, 3A, 350kHz Step-Down Switching Regulator
SC4525E	SEMTECH	获取价格	28V 3A Step-Down Switching Regulator
SC4525EEVB	SEMTECH	获取价格	28V 3A Step-Down Switching Regulator
SC4525EM	SEMTECH	获取价格	28V 3A Step-Down Switching Regulator
SC4525EMSETRT	SEMTECH	获取价格	Switching Regulator,