LP3874

更新时间： 2024-11-27 11:07:55

品牌	Logo	应用领域
德州仪器 - TI		电源电路线性稳压器IC
页数	文件大小	规格书
24页	1831K
描述
具有使能功能的 800mA、低压降稳压器

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LP3874 数据手册

LP3871

LP3874

www.ti.com

SNVS225G –FEBRUARY 2003–REVISED APRIL 2013

LP3871/LP3874 0.8A Fast Ultra Low Dropout Linear Regulators

Check for Samples: LP3871, LP3874

FEATURES

DESCRIPTION

The LP3871/LP3874 series of fast ultra low-dropout

linear regulators operate from a +2.5V to +7.0V input

supply. Wide range of preset output voltage options

are available. These ultra low dropout linear

regulators respond very quickly to step changes in

load, which makes them suitable for low voltage

microprocessor applications. The LP3871/LP3874 are

developed on a CMOS process which allows low

quiescent current operation independent of output

load current. This CMOS process also allows the

LP3871/LP3874 to operate under extremely low

dropout conditions.

•

Ultra Low Dropout Voltage

Low Ground Pin Current

Load Regulation of 0.04%

10nA Quiescent Current in Shutdown Mode

Specified Output Current of 0.8A DC

Available in DDPAK/TO-263, TO-220 and

SOT-223 Packages

•

Output Voltage Accuracy ±1.5%

Error Flag Indicates Output Status

Sense Option Improves Load Regulation

Minimum Output Capacitor Requirements

Overtemperature/Overcurrent Protection

−40°C to +125°C Junction Temperature Range

Dropout Voltage: Ultra low dropout voltage; typically

24mV at 80mA load current and 240mV at 0.8A load

current.

Ground Pin Current: Typically 6mA at 0.8A load

current.

APPLICATIONS

Shutdown Mode: Typically 10nA quiescent current

when the shutdown pin is pulled low.

•

Microprocessor Power Supplies

GTL, GTL+, BTL, and SSTL Bus Terminators

Power Supplies for DSPs

SCSI Terminator

Error Flag: Error flag goes low when the output

voltage drops 10% below nominal value.

SENSE: Sense pin improves regulation at remote

loads.

Post Regulators

High Efficiency Linear Regulators

Battery chargers

Precision Output Voltage: Multiple output voltage

options are available ranging from 1.8V to 5.0V with a

ensured accuracy of ±1.5% at room temperature, and

±3.0% over all conditions (varying line, load, and

temperature).

Other Battery Powered Applications

TYPICAL APPLICATION CIRCUITS

V_OUT

INPUT

3.3 V

V_OUT

LP3871-2.5

SD SENSE

GND

2.5V, 0.8A

C_IN

10 µF

C_OUT

10 µF

SD*

ERROR*

*SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this

function is not used. See application hints for more information.

V_OUT

INPUT

3.3 V ± 10%

V_IN

LP3874-2.5

SD SENSE

GND

V_OUT

2.5V, 0.8A

C_IN

10 µF

C_OUT

10 µF

SD*

*SD must be pulled high through a 10kΩ pull-up resistor. See application hints for more information.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...24

中文翻译

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LP3874 替代型号

型号	品牌	替代类型	描述	数据表
LP3874-ADJ	TI	功能相似	具有使能功能的 800mA、7V、可调节低压降稳压器
LP38841-ADJ	TI	功能相似	0.8A Ultra Low Dropout Adjustable Linear Regulators Stable with Ceramic Output Capacitors
LP3964	TI	功能相似	LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators

与LP3874相关器件

型号	品牌	获取价格	描述	数据表
LP3874-ADJ	TI	获取价格	具有使能功能的 800mA、7V、可调节低压降稳压器
LP3874-ADJ	NSC	获取价格	0.8A Fast Ultra Low Dropout Linear Regulators
LP3874EMP-1.8	NSC	获取价格	0.8A Fast Ultra Low Dropout Linear Regulators
LP3874EMP-1.8/NOPB	TI	获取价格	LP3871/LP3874 0.8A Fast Ultra Low Dropout Linear Regulators
LP3874EMP-1.8/NOPB	ROCHESTER	获取价格	1.8V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO5, SOT-223, 5-PIN
LP3874EMP-18	NSC	获取价格	0.8A Fast Ultra Low Dropout Linear Regulators
LP3874EMP-2.5	NSC	获取价格	0.8A Fast Ultra Low Dropout Linear Regulators
LP3874EMP-2.5	TI	获取价格	2.5V FIXED POSITIVE LDO REGULATOR, 0.35V DROPOUT, PDSO5, SOT-223, 5-PIN
LP3874EMP-2.5/NOPB	TI	获取价格	LP3871/LP3874 0.8A Fast Ultra Low Dropout Linear Regulators
LP3874EMP-3.3	TI	获取价格	LP3871/LP3874 0.8A Fast Ultra Low Dropout Linear Regulators

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