SC1534CS.TR

更新时间： 2024-09-17 13:02:55

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数据手册

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SC1534CS.TR 数据手册

400mA SmartLDO^TM

SC1534

PRELIMINARY - July 26, 2000

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

DESCRIPTION

FEATURES

•= Glitch-free transition between input sources

•= Internal logic selects input source

•= Gate drive for external PMOS bypass switch

•= 5V detector with hysteresis

The SC1534 is designed to maintain a glitch-free 3.3V

output when at least one of two inputs, 5V (VIN) and

3.3V (VAUX), is present.

•= 1% regulated output voltage accuracy

•= 400mA load current capability

Whenever VIN exceeds a predetermined threshold

value, the internal 3.3V linear regulator is enabled, and

DR is pulled high.

•= SO-8 and TO-263 packages

APPLICATIONS

When VIN falls below a lower threshold value, DR is

pulled low and the internal linear regulator is turned off.

DR has been designed to drive the gate of an external

low threshold P-channel MOSFET, which can be used

to connect the 3.3V supply directly to the regulator out-

put. This ensures an uninterrupted 3.3V output even if

VIN falls out of specification. A maximum R_DS(ON)of

200mΩ is recommended.

•= Desktop Computers

•= Network Interface Cards (NICs)

•= PCMCIA/PCI Interface Cards

•= Cardbus^TMTechnology

•= Power supplies with multiple input sources

ORDERING INFORMATION

Part Number⁽¹⁾

SC1534CM.TR

SC1534CS.TR

Note:

Package

TO-263-5L

SO-8

When both supplies are simultaneously available, the

drive pin (DR) will be pulled High, turning off the exter-

nal PMOS switch.

The internal 5V detector has its upper threshold (for

VIN rising) set to 4.22V (typical) while the lower thresh-

old (for VIN falling) is at 4.05V (typical) giving a hys-

teresis of approximately 170mV.

(1) Only available in tape and reel packaging.

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol Maximum Units

The SC1534 is available in the popular SO-8 and 5-

lead TO-263 surface mount packages.

Input Supply Voltage

VIN

-0.5 to +7

10 to 400

-5 to +70

Auxiliary Supply Voltage VAUX

BLOCK DIAGRAM

LDO Output Current

I_O

°C

Operating Ambient

Temperature Range

T_A

Operating Junction

Temperature Range

T_J

-5 to +125

°C

Storage Temperature

Range

T_STG

T_LEAD

-65 to +150 °C

Lead Temperature

(Soldering) 10 Sec

300

°C

Thermal Impedance

Junction to Ambient

SO-8⁽¹⁾

θ_JA

PIN CONFIGURATION

°C/W

TO-263

Top View

Thermal Impedance

Junction to Case

SO-8

θ_{J C}

°C/W

TO-263

ESD Rating

ESD

SO-8

TO-263-5L

Note:

(1) 1 inch square of 1/16” FR-4, double sided, 1 oz. mini-

mum copper weight.

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4 5 6 7

中文翻译

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与SC1534CS.TR相关器件

型号	品牌	获取价格	描述	数据表
SC1534CSTR	SEMTECH	获取价格	400mA SmartLDOTM
SC-15-34FG	SLPOWER	获取价格	Power Supply Module
SC-15-34P	SLPOWER	获取价格	Power Supply Module
SC-15-34VG	SLPOWER	获取价格	Power Supply Module
SC-15-34VP	SLPOWER	获取价格	Power Supply Module
SC1537	SEMTECH	获取价格	700mA SmartLDOTM
SC1537CMTR	SEMTECH	获取价格	700mA SmartLDOTM
SC1537CMTRT	SEMTECH	获取价格	Fixed Positive LDO Regulator, 3.3V, PSSO5, TO-263, 5 PIN
SC1537CSTR	SEMTECH	获取价格	700mA SmartLDOTM
SC1538	SEMTECH	获取价格	DUAL LINEAR CONTROLLER

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