Datasheet > SC4525E

SC4525E

更新时间： 2024-11-24 01:22:07

品牌	Logo	应用领域
商升特 - SEMTECH		/
页数	文件大小	规格书
23页	941K
描述
28V 3A Step-Down Switching Regulator

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中文翻译

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SC4525E 数据手册

SC4525E

28V 3A Step-Down Switching Regulator

POWER MANAGEMENT

Features

Description



Wide Input Voltage Range: 3V 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

The SC4525E 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 SC4525E can be programmed

up to 2MHz for component miniaturization or it can be

set at lower frequencies to accommodate high step-down

ratios. The SC4525E 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

SC4525E 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

Automotive Car Audio

The SC4525E is available in SOIC-8 EDP package.

Typical Application Circuit

Efficiency

D 1

10V – 28V

1N4148

4.7mF

C 1

0.33 mF

^IN= 24V

BST

^IN= 12V

O UT

5.2mH

5V/3A

R 4

SC4525E

SS/EN

33.2k

CO M P

RO SC

G ND

20BQ030

R 6

8.25k

C 2

10 mFX3

12.7k

22pF

15.8k

22nF

2.2nF

0.0

0.5

1.0

1.5

2.0

2.5

3.0

L1: Coiltronics CD 1- 5R 2

C 2: M urata G RM 31CR 60J106K

C4: M urata G RM 32ER71H475K

Load Current (A)

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

Rev. 2.ꢀ

ꢀ

12 3 4 5 6 7...23

中文翻译

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