Datasheet > SC4524E

SC4524E

更新时间： 2024-11-20 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	869K
描述
28V 2A Step-Down Switching Regulator

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中文翻译

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SC4524E 数据手册

SC4524E

28V 2A Step-Down Switching Regulator

POWER MANAGEMENT

Features

Description



Wide Input Voltage Range: 3V to 28V

2A 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 SC4524E is a constant frequency peak current-mode

step-down switching regulator capable of producing 2A

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

switching frequency of the SC4524E can be programmed

up to 2MHz for component miniaturization or it can be

set at lower frequencies to accommodate high step-down

ratios. The SC4524E 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

SC4524E 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 SC4524E is available in SOIC-8 EDP package.

Typical Application Circuit

Efficiency

D 1

10V – 28V

1N4148

C 4

2.2mF

C 1

0.33mF

BST

O UT

V_IN= 12V

V_IN= 24V

8.2mH

5V/2A

SC4524E

SS/EN

42.2k

CO M P

RO SC

G ND

20BQ030

10.5k

22mF

C 7

10nF

15.8k

C 8

22pF

28.0k

C 5

2.2nF

0.5

1.5

L1: Coiltronics DR 73-8R 2

C 2: M urata G RM 31CR 60J226K

C 4: M urata G RM 31CR 71H 225K

Load Current (A)

Figure 1. 1MHz 10V-28V to 5V/2A Step-down Converter

Rev. 2.0

ꢀ

12 3 4 5 6 7...23

中文翻译

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