SC4524SETRT datasheet(1/21 Pages) SEMTECH

部件名	SC4524SETRT

功能描述	Programmable Frequency, 2A Output 30V Step-Down Switching Regulator

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制造商	SEMTECH [Semtech Corporation]

网页	http://www.semtech.com

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SC4524

Programmable Frequency, 2A Output

30V Step-Down Switching Regulator

POWER MANAGEMENT

Revision: December 30th, 2006

Description

Features

Applications

Typical Application Circuit

u Up to 1.5 MHz Programmable Switching Frequency

u 2.3A Integrated Switch

u Wide Input Voltage Range 2.8V to 30V

u Peak Current-Mode Control with Cycle-by-Cycle

Current Limiting

u Hiccup Overload Protection

u Soft-Start and Enable

u Thermal Shutdown

u Thermally Enhanced 8-Pin SOIC Package

u Fully WEEE and RoHS Compliant

The SC4524 is an adjustable frequency peak current-

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.

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.

u XDSL and Cable Modems

u Set-top Boxes

u Point of Load Applications

u CPE Equipment

u DSP Power Supplies

u Disk Drives

SC4524

GND

IN

SW

BST

L1

4.7

mH

C2

0.1

mF

SS

COMP

FB

D2

20BQ030

5.49k

R2

R1

22.1k

22nF

C6

22pF

R5

15.4k

C5

470pF

L1: Coiltronics FP3-4R7

OUT

5V/2A

D1

1N4148

24V

ROSC

C1: Murata GRM21BR60J226M

C3

10

mF

17.4k

R3

C7

C3: Murata GRM32ER71H106K

V IN

C1

22

mF

Efficiency

50

55

60

65

70

75

80

85

90

0.0

0.5

1.0

1.5

2.0

Load Current (A)

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

类似零件编号 - SC4524SETRT

制造商	部件名	数据表	功能描述
Semtech Corporation	SC4524A	740Kb / 18P	28V 2A Step-Down Switching Regulator
	SC4524A	776Kb / 19P	28V 2A Step-Down Switching Regulator
	SC4524AEVB	740Kb / 18P	28V 2A Step-Down Switching Regulator
	SC4524AEVB	776Kb / 19P	28V 2A Step-Down Switching Regulator
	SC4524ASETRT	740Kb / 18P	28V 2A Step-Down Switching Regulator

More results

类似说明 - SC4524SETRT

制造商	部件名	数据表	功能描述
STMicroelectronics	L4978	135Kb / 12P	2A STEP DOWN SWITCHING REGULATOR May-2000
Semtech Corporation	SC2620	586Kb / 26P	Dual 2A, 30V Step-down Regulator with Programmable Frequency up to 1.4MHz
STMicroelectronics	L5985	955Kb / 36P	2A step-down switching regulator 16-Oct-2007
STMicroelectronics	L4978	584Kb / 13P	2A STEP DOWN SWITCHING REGULATOR May-2005
Semtech Corporation	SC2620	536Kb / 26P	Dual 2A, 30V Step-down Regulator with Programmable Frequency up to 1.4MHz
	SC4524D	790Kb / 21P	18V 2A Step-Down Switching Regulator 2A Output Current
	SC4530	1Mb / 23P	30V, 300mA Output Micropower Step-Down Switching Regulator
	SC2440A	4Mb / 28P	Dual 30V Step-Down Switching Regulator with 2A Switches
Shenzhen Huazhimei Semi...	HM1482D	1Mb / 7P	30V 2A Synchronous Step-Down Regulator
Shenzhen Huazhimei Semi...	HM8114	1Mb / 7P	30V 2A 500KHz Synchronous Step-Down Regulator