SC4524

更新时间： 2024-11-23 04:05:23

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	1196K
描述
Programmable Frequency, 2A Output 30V Step-Down Switching Regulator

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SC4524 数据手册

SC4524

Programmable Frequency, 2A Output

30V Step-Down Switching Regulator

POWER MANAGEMENT

Description

Features

The SC4524 is an adjustable frequency peak current- ꢀ Up to 1.5 MHz Programmable Switching Frequency

mode step-down switching regulator with an integrated

2.3A, 30V switch. The SC4524 can be programmed up

to 1.5MHz. This allows the use of small inductor and

ceramic capacitors, resulting in very compact power

supplies. The SC4524 is suitable for next generation XDSL

modems, set-top boxes and point of load applications.

ꢀ 2.3A Integrated Switch

ꢀ Wide Input Voltage Range 2.8V to 30V

ꢀ Peak Current-Mode Control with Cycle-by-Cycle

Current Limiting

ꢀ Hiccup Overload Protection

ꢀ Soft-Start and Enable

ꢀ Thermal Shutdown

ꢀ Thermally Enhanced 8-Pin SOIC Package

ꢀ Fully WEEE and RoHS Compliant

The SC4524 uses peak current-mode PWM control for

ease of compensation. Cycle-by-cycle current limit and

hiccup overload protection reduce power dissipation

during overload. Combined soft start and enable pin not

only eliminates output start up overshoot but also allows

power sequencing.

The SC4524 is available in SOIC-8 EDP package.

Applications

ꢀ XDSL and Cable Modems

ꢀ Set-top Boxes

ꢀ Point of Load Applications

ꢀ CPE Equipment

ꢀ DSP Power Supplies

ꢀ Disk Drives

Typical Application Circuit

Efficiency

24V

BST

1N4148

0.1ꢀF

OUT

22nF

SC4524

4.7ꢀH

5V/2A

22.1k

COMP

ROSC

GND

15.4k

20BQ030

22pF

5.49k

10ꢀF

22ꢀF

17.4k

470pF

L1: Coiltronics FP3-4R7

C1: Murata GRM21BR60J226M

C3: Murata GRM32ER71H106K

0.0

0.5

1.0

1.5

2.0

Load Current (A)

Figure 1. 1MHz 24V to 5V/2A Step-down Converter.

Revision: December 30th, 2006

www.semtech.com

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与SC4524相关器件

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SC4524A	SEMTECH	获取价格	28V 2A Step-Down Switching Regulator
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SC4524ASETRT	SEMTECH	获取价格	28V 2A Step-Down Switching Regulator
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SC4524BEVB	SEMTECH	获取价格	16V 2A Step-Down Switching Regulator
SC4524BSETRT	SEMTECH	获取价格	16V 2A Step-Down Switching Regulator
SC4524C	SEMTECH	获取价格	28V 2A Step-Down Switching Regulator Wide input range: 3V to 28V
SC4524CSETRT	SAMTEC	获取价格	28V 2A Step-Down Switching Regulator