Datasheet > 驱动程序和接口 > MOSFET 驱动器> SC2738

SC2738

更新时间： 2024-09-16 04:05:27

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
13页	232K
描述
Ultra Low Output Voltage Dual Linear FET Controller

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SC2738 数据手册

SC2738

Ultra Low Output Voltage

Dual Linear FET Controller

POWER MANAGEMENT

Description

Features

The SC2738 is an ultra low output voltage dual power

supply controller designed to simplify power management

for desktop PCs and graphics cards. It is part of Semtech’s

Smart LDO^TMfamily of products. The SC2738 has two

user adjustable outputs that can be set anywhere be-

tween 0.5V and 3.3V (V_IN= 12V, anywhere between 0.5V

and 1.8V for V_IN= 5V) using two external resistors per

output.

±3.5% reference voltage

Two independant and fully adjustable outputs

Wide supply voltage range permits operation from

5V or 12V rails

Very low quiescent current (500µA typical with both

outputs enabled and 5V input)

Indivdual Enable control for each output

Individual Power Good monitoring and signalling for

each output

SC2738 features for each output include tight output

voltage regulation (±3.5% over -40°C to +85°C), enable

controls, open drain power good signals, under-voltage

protection and soft start. The enable pins allow the part

to enter a very low power standby mode. Pulling them

high enables the outputs. The power good pins are open

drain and assert low when the voltage at their

respective adjust pins is below 88% (typ.) of nominal. If

the voltage at the adjust pin is below 50% (typ.) of

nominal, the under-voltage protection circuitry will shut

down that output. The SC2738 is available in an

MSOP-10 surface mount package.

Gate drives from input supply enable use of

N-channel MOSFETs

User selectable dropout voltage

Individual under-voltage protection for each output

MSOP-10 surface mount package

Applications

Desktop PCs

Graphics cards

Simple dual power supplies

Typical Application Circuit

5V or 12V IN

VIN1

VIN2

0.1uF (1)

VOUT1

VOUT2

100uF, 25mOhm POSCAP

DRV1

ADJ1 DRV2

SC2738

R5 2k (2)

11.0k

R6 2k (2)

20.0k

OUT1 Enable

EN1

ADJ2

EN2

OUT1 Power Good

OUT2 Enable

PGD1

GND

OUT2 Power Good

PGD2

10nF (2)

0.1uF

10.0k

10nF (2)

10.0k

Notes:

V_OUT1= 0.5 • 1+

V_OUT2= 0.5 • 1+

(1) Additional capacitance may be required if far from supply

(2) Optional soft-start components

Revision: November 16, 2004

www.semtech.com

12 3 4 5 6 7...13

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与SC2738相关器件

型号	品牌	获取价格	描述	数据表
SC2738IMSTR	SEMTECH	获取价格	Buffer/Inverter Based MOSFET Driver, PDSO10, MSOP-10
SC2738IMSTRT	SEMTECH	获取价格	Ultra Low Output Voltage Dual Linear FET Controller
SC275H045A5B	VISHAY	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045A5BPBF	INFINEON	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045A5FPBF	INFINEON	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045A5P	VISHAY	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045A5PPBF	INFINEON	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045A5R	VISHAY	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045A5RPBF	INFINEON	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER
SC275H045S5B	VISHAY	获取价格	Rectifier Diode, Schottky, 1 Phase, 1 Element, 45V V(RRM), Silicon, WAFER

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