SC4525D

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	735K
描述
18V, 3A, 350kHz Step-Down Switching Regulator

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SC4525D 数据手册

SC4525D

18V, 3A, 350kHz Step-Down

Switching Regulator

POWER MANAGEMENT

Features

Description



Input range: 3V to 18V

3A Output Current

The SC4525D is a 350kHz constant frequency peak

current-mode step-down switching regulator capable of

producing 3A output current from an input ranging from

3V to 18V. The SC4525D is suitable for next generation

XDSL modems, high-deﬁnition TVs and various point of

load applications.

350kHz Fixed Switching 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

Thermally Enhanced 8-pin SOIC Package

Fully RoHS and WEEE compliant

Peak current-mode PWM control employed in the

SC4525Dachievesfasttransientresponsewithsimpleloop

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

The SC4525D is available in SOIC-8 EDP package.



XDSL and Cable Modems

Set Top Boxes

Point of Load Applications

CPE Equipment

DSP Power Supplies

LCD and Plasma TVs

Typical Application Circuit

Efficiency

10 V–16V

1N 4148

10mF

0.33 mF

V_IN=12V

BST

OUT

10mH

5V/3A

SC4525D

SS/EN

COMP

33.2k

GND

RSET

20BQ030

8.25k

47mF

60.4k

11.5k

22 nF

2.2nF

L1 : Coiltronics CD1-100

C2 : Murata GRM31CR60J 476M

C4 : Murata GRM31CR61E106K

0.5

1.5

2.5

Load Current (A)

Figure 1. 350kHz 10V -16V to 5V/3A Step-down Converter

Jan. 13, 2011

www.semtech.com

12 3 4 5 6 7...21

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