SC338

更新时间： 2024-09-19 03:33:23

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
14页	241K
描述
Ultra Low Output Voltage Dual Linear FET Controller

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SC338 数据手册

SC338(A)

Ultra Low Output Voltage

Dual Linear FET Controller

POWER MANAGEMENT

Description

Features

The SC338(A) is an ultra low output voltage dual power

supply controller designed to simplify power management

for notebook PCs. It is part of Semtech’s Smart LDO^TM

family of products. The SC338(A) has two user

adjustable outputs that can be set anywhere between

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.

±1.5% and ±2.5% reference voltage options

available

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

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

SC338(A) features for each output include tight output

voltage regulation (±2.5% over -40°C to +85°C for

SC338, ±1.5% over 0°C to +85°C for SC338A), 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 SC338(A) is available in an

MSOP-10 surface mount package.

Applications

Notebook PCs

Simple dual power supplies

Typical Application Circuit

5V or 12V IN

1.2V +/-5% IN

1.8V +/-5% IN

0.1uF (1)

1.05V @ 3A

1.5V @ 1.5A

IRF7311

or similar

100uF, 25mOhm POSCAP

DRV1

SC338(A)

R5 2k (2)

11.0k

R6 2k (2)

20.0k

ADJ1 DRV2

1.05V Enable

EN1

ADJ2

EN2

1.05V Power Good

1.5V Enable

PGD1

GND

1.5V 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 12, 2004

www.semtech.com

12 3 4 5 6 7...14

中文翻译

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与SC338相关器件

型号	品牌	获取价格	描述	数据表
SC338A	SEMTECH	获取价格	Ultra Low Output Voltage Dual Linear FET Controller
SC338AIMSTR	SEMTECH	获取价格	Ultra Low Output Voltage Dual Linear FET Controller
SC338AIMSTRT	SEMTECH	获取价格	Ultra Low Output Voltage Dual Linear FET Controller
SC338IMSTR	SEMTECH	获取价格	Ultra Low Output Voltage Dual Linear FET Controller
SC338IMSTRT	SEMTECH	获取价格	Ultra Low Output Voltage Dual Linear FET Controller
SC339	SEMTECH	获取价格	Ultra Low Output Voltage Linear FET Controller
SC339EVB	SEMTECH	获取价格	Ultra Low Output Voltage Linear FET Controller
SC339SKTRT	SEMTECH	获取价格	Ultra Low Output Voltage Linear FET Controller
SC33E6	INFINEON	获取价格	SIEMENS ANNOUNCES A SUB-MICTON GENERATION OF CHANNELLESS GATE-ARRAYS BASED ON THE PROVEN M
SC34	ZOWIE	获取价格	SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER

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