SC4501EVB

更新时间： 2024-11-23 04:05:23

品牌	Logo	应用领域
商升特 - SEMTECH		调节器开关软启动
页数	文件大小	规格书
21页	617K
描述
2Amp, 2MHz Step-Up Switching Regulator with Soft-Start

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SC4501EVB 数据手册

SC4501

2Amp, 2MHz Step-Up Switching

Regulator with Soft-Start

POWER MANAGEMENT

Features

Description

The SC4501 is a high-frequency current-mode step-up

switching regulator with an integrated 2A power transis-

tor. Its high switching frequency (programmable up to

2MHz) allows the use of tiny surface-mount external pas-

sive components. Programmable soft-start eliminates high

inrush current during start-up. The internal switch is rated

at 32V making the converter suitable for high voltage ap-

plications such as Boost, SEPIC and Flyback.

u Low saturation voltage switch: 220mV at 2A

u Constant switching frequency current-mode control

u Programmable switching frequency up to 2MHz

u Soft-Start function

u Input voltage range from 1.4V to 16V

u Output voltage up to 32V

u Low shutdown current

u Adjustable undervoltage lockout threshold

u Small low-profile thermally enhanced packages

The operating frequency of the SC4501 can be set with an

external resistor. The ability to set the operating frequency

gives the SC4501 design flexibilities. A dedicated COMP

pin allows optimization of the loop response. The SC4501

is available in thermally enhanced 8-Pin MSOP and 10-pin

MLPD packages.

Applications

u Flat screen LCD bias supplies

u TFT bias supplies

u XDSL power supplies

u Medical equipment

u Digital video cameras

u Portables devices

u White LED power supplies

Typical Application Circuit

VOUT

VIN

12V, 0.7A

10BQ015

174K

Efficiency

SHDN

SC4501

OFF ON

10.5mH, 700KHz

4.7mH, 1.4MHz

10mF

2.2mF

GND

COMP

ROSC

20K

47nF

3.3mH, 2MHz

All Capacitors are Ceramic.

MSOP-8 Pinout

f / MHz R₃/ KW R₄/ KW C₄/ pF C₆/ pF

L₁/ mH

V_IN= 5V

V_OUT= 12V

0.7

1.35

22.1

30.9

63.4

22.1

9.31

4.75

2200

820

10.5 (Falco D08019)

4.7 (Falco D08017)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

Load Current (A)

470

3.3 (Coilcraft DO1813P)

Figure 1(a). 5V to 12V Boost Converter.

Figure 1(b). Efficiencies of 5V to 12V Boost Converters at

700KHz, 1.4MHz and 2MHz.

Revision: October 25, 2005

www.semtech.com

12 3 4 5 6 7...21

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与SC4501EVB相关器件

型号	品牌	获取价格	描述	数据表
SC4501MLTRT	SEMTECH	获取价格	2Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4501MSETRT	SEMTECH	获取价格	2Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502EVB	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502H	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502HEVB	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502HMLTRT	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4502MLTRT	SEMTECH	获取价格	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
SC4503	SEMTECH	获取价格	1.3MHz Step-Up Switching Regulator with 1.4A Switch
SC4503EVB	SEMTECH	获取价格	1.3MHz Step-Up Switching Regulator with 1.4A Switch

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