Datasheet > SC4525FEVB

SC4525FEVB

更新时间： 2024-11-20 01:11:35

品牌	Logo	应用领域
商升特 - SEMTECH		/
页数	文件大小	规格书
23页	1000K
描述
18V, 3A, 350kHz Step-Down Switching Regulator

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SC4525FEVB 数据手册

SC4525F

18V, 3A, 350kHz Step-Down

Switching Regulator

POWER MANAGEMENT

Features

Description



Input Voltage Range: 3V to ꢀ8V

3A Output Current

350kHz Fixed Switching 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 SC4525F 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 ꢀ8V. The SC4525F is suitable for next generation

XDSL modems, high-deﬁnition TVs and various point of

load applications.

Peak current-mode PWM control employed in the

SC4525F 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.

Thermal Shutdown

Thermally Enhanced 8-pin SOIC Package

Fully RoHS and WEEE Compliant

Applications

The SC4525F 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

D 1

10V – 16V

1N4148

C 4

10mF

C 1

0.33mF

V_IN=12V

BST

O UT

10mH

5V/3A

SC4525F

SS/EN

33.2k

CO M P

RSET

G ND

20BQ030

8.25k

47mF

22nF

60.4k

47pF

11.5k

C 5

2.2nF

0.5

1.5

2.5

L1: Coiltronics CD 1- 100

C 2: M urata G RM 31CR 60J476M

C4: M urata G RM 31CR61E106K

Load Current (A)

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

Revision 2.ꢀ

ꢀ

12 3 4 5 6 7...23

中文翻译

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