UNISONIC TECHNOLOGIES CO., LTD

LR3966

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 7

Copyright © 2014 Unisonic Technologies Co., Ltd

QW-R101-032.F

3.0A LOW DROPOUT LINEAR

REGULATOR



DESCRIPTION

The LR3966 is a low-noise, low-dropout linear regulator

operated from a 2.5V to 6V input voltage and is guaranteed to

deliver 3A output current. Wide range of preset output voltage

options are available. Built-in low on-resistance transistor provides

low dropout voltage and large output current. The LR3966 is

designed and optimized for battery-powered systems to work with

low noise.

The LR3966 is developed on a CMOS process technology

which allows low quiescent current operation independent of output

load current. This CMOS process also allows the LR3966 to operate

under extremely low dropout conditions.



FEATURES

* 3A Guaranteed Output Current

* Ultra Low Dropout Voltage

* Low Ground Pin Current

* Low Temperature Coefficient

* Current Limiting Protection

* Thermal Shutdown Protection

* Excellent Line/Load Transient

* SENSE Option Improves Load Regulation

TO-263

1

SOT-223

1

1

TO-252-5

TO-263-5

1



ORDERING INFORMATION

Note: Pin Assignment: G: GND

E: EN

A: SENSE/ADJ

(1) T: Tube, R: Tape Reel

(2) refer to Pin Assignment

(3) AA3: SOT-223, TN5: TO-252-5, TQ2: TO-263,

(4) xx: refer to Marking Information

(5) L: Lead Free, G: Halogen Free and Lead Free

LR3966G-xx-AA3-A-R

(1)Packing Type

(2)Pin Assignment

(3)Package Type

(4)Output Voltage Code

(5)Green Package

Ordering Number

Package

Pin Assignment

Packing

Lead Free

Halogen Free

1

2

3

4

5

-

LR3966G-xx-AA3-A-R

SOT-223

G

O

I

-

-

Tape Reel

-

LR3966G-xx-AA3-D-R

SOT-223

I

G

O

-

-

Tape Reel

LR3966L-xx-TQ2-A-T

LR3966G-xx-TQ2-A-T

TO-263

G

O

I

-

-

Tube

LR3966L-xx-TQ2-A-R

LR3966G-xx-TQ2-A-R

TO-263

G

O

I

-

-

Tape Reel

LR3966L-xx-TQ2-D-T

LR3966G-xx-TQ2-D-T

TO-263

I

G

O

-

-

Tube

LR3966L-xx-TQ2-D-R

LR3966G-xx-TQ2-D-R

TO-263

I

G

O

-

-

Tape Reel

LR3966L-xx-TN5-T

LR3966G-xx-TN5-T

TO-252-5

E

I

G

O

A

Tube

LR3966L-xx-TN5-R

LR3966G-xx-TN5-R

TO-252-5

E

I

G

O

A

Tape Reel

LR3966L-xx-TQ5-T

LR3966G-xx-TQ5-T

TO-263-5

E

I

G

O

A

Tube

LR3966L-xx-TQ5-R

LR3966G-xx-TQ5-R

TO-263-5

E

I

G

O

A

Tape Reel