SC4524D

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	759K
描述
18V 2A Step-Down Switching Regulator 2A Output Current

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SC4524D 数据手册

SC4524D

18V 2A Step-Down Switching Regulator

POWER MANAGEMENT

Features

Description



Wide input range: 3V to 18V

2A 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 SC4524D is a constant frequency peak current-mode

step-down switching regulator capable of producing 2A

output current from an input ranging from 3V to 18V. The

switching frequency of the SC4524D is programmable

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

ceramic capacitors for miniaturization, and high input/

output conversion ratio. The SC4524D 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

SC4524Dachievesfasttransientresponsewithsimpleloop

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 SC4524D is available in SOIC-8 EDP package.

Typical Application Circuit

Efficiency

10V – 16V

1N4148

2.2PF

0.33PF

BST

OUT

5V/2A

V_IN= 12V

6.8PH

SC4524D

SS/EN

102k

GND

COMP

ROSC

20BQ030

25.5k

22PF

10nF

15.8k

30.1k

10pF

1nF

L1: Wurth 744 778 9006

C2: Murata GRM31CR60J226K

C4: Murata GRM31CR61E225K

0.5

1.5

Load Current (A)

Figure 1. 1MHz 10V-16V to 5V/2A Step-down Converter

Dec. 9, 2010

12 3 4 5 6 7...21

中文翻译

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