SC4501 datasheet(1/21 Pages) SEMTECH

부품명	SC4501

상세설명	2Amp, 2MHz Step-Up Switching Regulator with Soft-Start

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제조업체	SEMTECH [Semtech Corporation]

홈페이지	http://www.semtech.com

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POWER MANAGEMENT

1

www.semtech.com

SC4501

2Amp, 2MHz Step-Up Switching

Regulator with Soft-Start

Description

Features

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

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.

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.

Typical Application Circuit

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

Revision: October 25, 2005

C1

2.2

µF

5V

VIN

VOUT

SC4501

2

3

1

5

6

4

GND

SHDN

SS

IN

SW

FB

ROSC

COMP

8

7

ON

OFF

C3

10BQ015

R4

D1

L1

C2

10

µF

47nF

R2

20K

R1

174K

12V, 0.7A

C4

R3

C6

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

All Capacitors are Ceramic.

MSOP-8 Pinout

f / MHz R

3 / KΩ

R

4 / KΩ

C

4 / pF

C

6 / pF

L

1 / µH

0.7

22.1

2200

-

10.5

(Falco D08019)

1.35

30.9

9.31

820

-

4.7

(Falco D08017)

2

63.4

4.75

470

22

3.3

(Coilcraft DO1813P)

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

700KHz, 1.4MHz and 2MHz.

Efficiency

50

55

60

65

70

75

80

85

90

95

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

Load Current (A)

VOUT = 12V

4.7

µH, 1.4MHz

10.5

µH, 700KHz

3.3

µH, 2MHz

VIN = 5V

유사한 부품 번호 - SC4501

제조업체	부품명	데이터시트	상세설명
Semtech Corporation	SC450	89Kb / 1P	Portable IMVP-IV??and IMVP4??Dual Phase Power Supply Controller
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	SC4502	407Kb / 19P	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
	SC4502EVB	407Kb / 19P	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
	SC4502H	407Kb / 19P	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start

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유사한 설명 - SC4501

제조업체	부품명	데이터시트	상세설명
Seiko Instruments Inc	S-8435	2Mb / 42P	STEP-UP SWITCHING REGULATOR
Semtech Corporation	SC4502	407Kb / 19P	1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start
Semtech Corporation	SC4521	322Kb / 18P	3A Step-Down Switching Regulator with Programmable Soft Start
Kingbor Technology Co	KB3302	248Kb / 17P	2Amp, 2MHz Step-up Switching regulator with Soft-Start
Linear Technology	LT3467	268Kb / 16P	1.1A Step-Up DC/DC Converter with Integrated Soft-Start
	LT3467	276Kb / 18P	1.1A Step-Up DC/DC Converter with Integrated Soft-Start
	LT3467A	276Kb / 18P	1.1A Step-Up DC/DC Converter with Integrated Soft-Start
Seiko Instruments Inc	S-19243A12A-E8T1U	3Mb / 74P	CMOS VOLTAGE REGULATOR WITH SOFT-START FUNCTION
	S-19243A12H-E8T1U	3Mb / 74P	CMOS VOLTAGE REGULATOR WITH SOFT-START FUNCTION
	S-19254E12H-E8T1U	2Mb / 32P	CMOS VOLTAGE REGULATOR WITH SOFT-START FUNCTION

More results

SC4501 데이터시트(PDF) 1 Page - Semtech Corporation

SC4501 데이터시트(HTML) 1 Page - Semtech Corporation

유사한 부품 번호 - SC4501

유사한 설명 - SC4501

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