LP3883

www.ti.com

SNVS223F – NOVEMBER 2002 – REVISED APRIL 2013

LP3883 3A Fast-Response Ultra Low Dropout Linear Regulators

Check for Samples: LP3883

1

FEATURES

DESCRIPTION

The LP3883 is a high-current, fast-response regulator

2

•

Ultra Low Dropout Voltage (210 mV @ 3A typ)

which can maintain output voltage regulation with

•

Low Ground Pin Current

minimum input to output voltage drop. Fabricated on

•

Load Regulation of 0.04%/A

a CMOS process, the device operates from two input

voltages: Vbias provides voltage to drive the gate of

•

60 nA Typical Quiescent Current in Shutdown

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

•

1.5% Output Accuracy (25°C)

voltage which supplies power to the load. The use of

•

TO-220, DDPAK/TO-263 Packages

an external bias rail allows the part to operate from

ultra low Vin voltages. Unlike bipolar regulators, the

•

Over Temperature/over Current Protection

CMOS

architecture

consumes

extremely

low

•

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

quiescent current at any output load current. The use

of an N-MOS power transistor results in wide

APPLICATIONS

bandwidth, yet minimum external capacitance is

required to maintain loop stability.

•

DSP Power Supplies

•

Server Core and I/O Supplies

The fast transient response of these devices makes

them

suitable

for

use

in

powering

DSP,

•

Linear Power Supplies for PC Add-in-Cards

Microcontroller Core voltages and Switch Mode

•

Set-Top Box Power Supplies

Power Supply post regulators. The parts are available

•

Microprocessor Power Supplies

in TO-220 and DDPAK/TO-263 packages.

•

High Efficiency Linear Power Supplies

Dropout Voltage: 210 mV (typ) @ 3A load current.

•

SMPS Post-Regulators

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

Connection Diagram

Figure 1. TO-220, Top View

Figure 2. DDPAK/TO-263, Top View

See NDH0005D Package

See KTT0005B Package

1

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.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.