Datasheet > SC4525EEVB

SC4525EEVB

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	1314K
描述
28V 3A Step-Down Switching Regulator

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中文翻译

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SC4525EEVB 数据手册

SC4525EM

28V 3A Step-Down Switching Regulator

HIGH-RELIABILITY PRODUCTS

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 SC4525EM 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

switchingfrequencyoftheSC4525EMcanbeprogrammed

up to 2MHz for component miniaturization or it can be

set at lower frequencies to accommodate high step-down

ratios. The SC4525EM is suitable for various point of load

applications.

Thermal Shutdown

Thermally Enhanced 8-pin SOIC Package

Fully RoHS and WEEE Compliant

Military Temperature Range: -55°C to +ꢀ25°C

Peak current-mode PWM control employed in the

SC4525EM 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



Point of Load Applications

The SC4525EM is available in SOIC-8 EDP package.

Typical Application Circuit

Efficie ncy

10V – 28V

1N4148

4.7mF

0.33 mF

^IN= 24V

BST

^IN= 12V

O UT

5.2mH

5V/3A

R 8

SC4525EM

SS/EN

33.2k

CO M P

RO SC

G ND

470pF

20BQ 030

8.25k

10mFX3

R 5

15.8k

12.7k

22pF

22nF

C 5

2.2nF

0.0

0.5

1.0

1.5

2.0

2.5

3.0

L1: Coiltronics CD 1- 5R 2

C2: M urata G RM 31CR60J106K

C4: M urata G RM 32ER71H475K

Load Current (A)

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

Rev. 2.0

ꢀ

12 3 4 5 6 7...23

中文翻译

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