SC4524C

更新时间： 2024-11-19 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	770K
描述
28V 2A Step-Down Switching Regulator Wide input range: 3V to 28V

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SC4524C 数据手册

SC4524C

28V 2A Step-Down Switching Regulator

POWER MANAGEMENT

Features

Description



Wide input range: 3V to 28V

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 SC4524C 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 SC4524C is programmable

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

ceramic capacitors for miniaturization, and high input/

output conversion ratio. The SC4524C 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

SC4524C 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 SC4524C is available in SOIC-8 EDP package.

Typical Application Circuit

Efficiency

10V – 28V

1N4148

2.2PF

0.33PF

BST

OUT

5V/2A

V_IN= 12V

V_IN= 24V

8.2PH

SC4524C

SS/EN

42.2k

GND

COMP

ROSC

20BQ030

10.5k

22PF

10nF

15.8k

28.0k

22pF

2.2nF

0.5

1.5

L1: Coiltronics DR73-8R2

C2: Murata GRM31CR60J226K

C4: Murata GRM31CR71H225K

Load Current (A)

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

Dec. 2, 2010

12 3 4 5 6 7...21

中文翻译

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