Datasheet > LP3891EMR-12

LP3891EMR-12

更新时间： 2024-01-02 16:49:58

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
19页	1098K
描述
LP3891 0.8A Fast-Response Ultra Low Dropout Linear Regulators

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数据手册

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LP3891EMR-12 数据手册

LP3891

www.ti.com

SNVS235D –SEPTEMBER 2003–REVISED APRIL 2013

LP3891 0.8A Fast-Response Ultra Low Dropout Linear Regulators

Check for Samples: LP3891

FEATURES

DESCRIPTION

The LP3891 is a high current, fast response regulator

which can maintain output voltage regulation with

minimum input to output voltage drop. Fabricated on

a CMOS process, the device operates from two input

voltages: Vbias provides voltage to drive the gate of

the N-MOS power transistor, while Vin is the input

voltage which supplies power to the load. The use of

an external bias rail allows the part to operate from

ultra low Vin voltages. Unlike bipolar regulators, the

CMOS architecture consumes extremely low

quiescent current at any output load current. The use

of an N-MOS power transistor results in wide

bandwidth, yet minimum external capacitance is

required to maintain loop stability.

•

Ultra Low Dropout Voltage (100mV at 0.8A typ)

Low Ground Pin Current

Load Regulation of 0.04%/A

60 nA Typical Quiescent Current in Shutdown

1.5% Output Accuracy (25°C)

TO-220, DDPAK/TO-263 and SO PowerPAD-8

Packages

•

Over Temperature/Over Current Protection

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

APPLICATIONS

•

DSP Power Supplies

The fast transient response of these devices makes

them suitable for use in powering DSP,

Microcontroller Core voltages and Switch Mode

Power Supply post regulators. The parts are available

in TO-220, DDPAK/TO-263 and SO PowerPAD-8

packages.

Server Core and I/O Supplies

PC Add-in-Cards

Local Regulators in Set-Top Boxes

Microcontroller Power Supplies

High Efficiency Power Supplies

SMPS Post-Regulators

Dropout Voltage: 100 mV (typ) at 0.8A load current.

Ground Pin Current: 3 mA (typ) at full load.

Shutdown Current: 60 nA (typ) when S/D pin is low.

Precision Output Voltage: 1.5% room temperature

accuracy.

TYPICAL APPLICATION CIRCUIT

At least 10 µF of input and output capacitance is required for stability.

*Tantalum capacitors are recommended. Aluminum electrolytic capacitors may be used for restricted temperature

range. See application hints.

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...19

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与LP3891EMR-12相关器件

型号	品牌	获取价格	描述	数据表
LP3891EMRX-1.2	TI	获取价格	LP3891 0.8A Fast-Response Ultra Low Dropout Linear Regulators
LP3891EMRX-1.2	NSC	获取价格	IC VREG 1.216 V FIXED POSITIVE LDO REGULATOR, 0.43 V DROPOUT, PDSO8, MOLDED, PSOP-8, Fixed
LP3891EMRX-1.2/NOPB	NSC	获取价格	IC VREG 1.216 V FIXED POSITIVE LDO REGULATOR, 0.43 V DROPOUT, PDSO8, MOLDED, PSOP-8, Fixed
LP3891EMRX-1.2/NOPB	TI	获取价格	0.8A Fast-Response Ultra Low Dropout Linear Regulators
LP3891ES-1.2	TI	获取价格	1.5% Output Accuracy (25Â°C), 60 nA Typical Q
LP3891ES-1.2	NSC	获取价格	0.8A Fast-Response Ultra Low Dropout Linear
LP3891ES-1.2/NOPB	NSC	获取价格	IC VREG 1.216 V FIXED POSITIVE LDO REGULATOR, 0.4 V DROPOUT, PSSO5, MOLDED, TO-263, 5 PIN,
LP3891ES-1.2/NOPB	TI	获取价格	0.8A Fast-Response Ultra Low Dropout Linear Regulators
LP3891ES-1.5	NSC	获取价格	0.8A Fast-Response Ultra Low Dropout Linear
LP3891ES-1.5	TI	获取价格	LP3891 0.8A Fast-Response Ultra Low Dropout Linear Regulators

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