SC4524FEVB datasheet(1/23 Pages) SEMTECH

tên linh kiện	SC4524FEVB

Giải thích chi tiết về linh kiện	18V 2A Step-Down Switching Regulator

PDF	23 Pages

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nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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POWER MANAGEMENT

Rev. 2.0

18V 2A Step-Down Switching Regulator

SC4524F

Typical Application Circuit

Features

Wide Input Voltage Range: 3V to 18V

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

Thermally Enhanced 8-pin SOIC Package

Fully RoHS and WEEE Compliant

Applications

XDSL and Cable Modems

Set Top Boxes

Point of Load Applications

CPE Equipment

DSP Power Supplies

LCD and Plasma TVs



Description

The SC4524F is a constant frequency peak current-mode

step-down switching regulator capable of producing 2A

output current from an input ranging from 3V to 18V. The

switching frequency of the SC4524F is programmable

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

ceramic capacitors for miniaturization, and high input/

output conversion ratio. The SC4524F is suitable for

next generation XDSL modems, high-definition TVs and

various point of load applications.

Peak current-mode PWM control employed in the

SC4524F 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.

The SC4524F is available in SOIC-8 EDP package.

Figure 1 — 1MHz 10V-16V to 5V/2A Step-down Converter

Efficiency

40

45

50

55

60

65

70

75

80

85

90

0

0.5

1

1.5

2

Load Current (A)

S S 270 RE V 4

VIN = 12V

SC4524F

G ND

IN

SW

BST

L1

6.8mH

C 1

0.33mF

SS/EN

CO M P

FB

D2

20BQ030

25.5k

R6

102k

10nF

C8

10pF

C 5

1nF

L1: W urth 744 778 9006

O UT

5V/2A

D 1

1N4148

10V – 16V

RO SC

C 2: M urata G RM 31CR 60J226K

C 4

2.2mF

C4: M urata G RM 31CR61E225K

V IN

C2

22mF

C 7

R4

15.8k

R5

30.1k

R7

Số phần tương tự - SC4524FEVB

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Semtech Corporation	SC4524	1Mb / 21P	Programmable Frequency, 2A Output 30V Step-Down Switching Regulator
	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

More results

Mô tả tương tự - SC4524FEVB

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	L4978	135Kb / 12P	2A STEP DOWN SWITCHING REGULATOR May-2000
STMicroelectronics	L5985	955Kb / 36P	2A step-down switching regulator 16-Oct-2007
Aimtron Technology	AT1792	1Mb / 14P	2A/18V/300KHz Step-Down Voltage Regulator
STMicroelectronics	L4978	584Kb / 13P	2A STEP DOWN SWITCHING REGULATOR May-2005
Semtech Corporation	SC4524B	756Kb / 18P	18V 2A Step-Down Switching Regulator
	SC4525D	759Kb / 21P	18V, 3A, 350kHz Step-Down Switching Regulator
	SC4524D	790Kb / 21P	18V 2A Step-Down Switching Regulator 2A Output Current
Exar Corporation	XRP7674	737Kb / 12P	2A 18V Synchronous PFM/PWM Step-Down Regulator
Shenzhen Huazhimei Semi...	HM1470	1Mb / 7P	18V 2A 500KHz Synchronous Step-Down Regulator
Shenzhen Huazhimei Semi...	HM2259C	1Mb / 7P	18V 2A 600KHz Synchronous Step-Down Regulator

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