SC4525C

更新时间： 2024-11-23 09:33:23

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
21页	717K
描述
28V 3A Step-Down Switching Regulator Thermal Shutdown

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中文翻译

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数据手册

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SC4525C 数据手册

SC4525C

28V 3A Step-Down Switching Regulator

POWER MANAGEMENT

Features

Description



Wide input range: 3V to 28V

3A 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

Thermal Shutdown

The SC4525C is a constant frequency peak current-mode

step-down switching regulator capable of producing 3A

output current from an input ranging from 3V to 28V. The

switching frequency of the SC4525C is programmable

up to 2MHz, allowing the use of small inductors and

ceramic capacitors for miniaturization, and high input/

output conversion ratio. The SC4525C 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

SC4525C 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 SC4525C is available in SOIC-8 EDP package.

Typical Application Circuit

Efficiency

10V– 28V

1N4148

4.7mF

0.33mF

V_IN= 24V

BST

V_IN= 12V

OUT

5.2mH

5V/3A

33.2k

SC4525C

SS/EN

GND

COMP

ROSC

20BQ030

8.25k

10mFX3

12.7k

22pF

15.8k

22nF

2.2nF

0.0

0.5

1.0

1.5

2.0

2.5

3.0

L1: CoiltronicsCD1-5R2

C2: Murata GRM31CR60J106K

C4: Murata GRM32ER71H475K

Load Current (A)

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

Jan. 13, 2011

12 3 4 5 6 7...21

中文翻译

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