Datasheet > LP3882ET-1.8

LP3882ET-1.8

更新时间： 2024-09-28 22:11:43

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页数	文件大小	规格书
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描述
1.5A Fast-Response Ultra Low Dropout Linear

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LP3882ET-1.8 数据手册

August 2003

LP3882

1.5A Fast-Response Ultra Low Dropout Linear

Regulators

General Description

Features

n Ultra low dropout voltage (110 mV 1.5A typ)

The LP3882 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 regula-

tors, the CMOS architecture consumes extremely low quies-

cent current at any output load current. The use of an

n Low ground pin current

n Load regulation of 0.04%/A

n 60 nA typical quiescent current in shutdown

n 1.5% output accuracy (25˚C)

n TO-220, TO-263 packages

n Over temperature/over current protection

n −40˚C to +125˚C junction temperature range

N-MOS power transistor results in wide bandwidth, yet mini- Applications

mum external capacitance is required to maintain loop sta-

bility.

n DSP Power Supplies

n Server Core and I/O Supplies

n PC Add-in-Cards

n Local Regulators in Set-Top Boxes

n Microcontroller Power Supplies

n High Efficiency Power Supplies

n SMPS Post-Regulators

The fast transient response of these devices makes them

suitable for use in powering DSP, Microcontroller Core volt-

ages and Switch Mode Power Supply post regulators. The

parts are available in TO-220 and TO-263 packages.

Dropout Voltage: 110 mV (typ) 1.5A 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 accu-

racy.

Typical Application Circuit

20063201

At least 4.7 µF of input and output capacitance is required for stability.

Connection Diagrams

20063202

20063203

TO-220, Top View

TO-263, Top View

DS200632

www.national.com

12 3 4 5 6 7...12

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