LM1085

www.ti.com

SNVS038G – JULY 1999 – REVISED MARCH 2013

LM1085 3A Low Dropout Positive Regulators

Check for Samples: LM1085

1

FEATURES

DESCRIPTION

The LM1085 is a series of low dropout positive

2

•

Available in 3.3V, 5.0V, 12V and Adjustable

voltage regulators with a maximum dropout of 1.5V at

Versions

3A of load current. It has the same pin-out as TI's

•

Current Limiting and Thermal Protection

industry standard LM317.

•

Output Current 3A

The LM1085 is available in an adjustable version,

•

Line Regulation 0.015% (typical)

which can set the output voltage with only two

external resistors. It is also available in three fixed

•

Load Regulation 0.1% (typical)

voltages: 3.3V, 5.0V and 12.0V. The fixed versions

integrate the adjust resistors.

APPLICATIONS

The

LM1085

circuit

includes

a

zener

trimmed

•

High Efficiency Linear Regulators

bandgap reference, current limiting and thermal

•

Battery Charger

shutdown.

•

Post Regulation for Switching Supplies

The LM1085 series is available in TO-220 and

•

Constant Current Regulator

DDPAK/TO-263 packages. Refer to the LM1084 for

•

Microprocessor Supply

the 5A version, and the LM1086 for the 1.5A version.

Connection Diagram

Figure 1. TO-220 Top View

Figure 2. DDPAK/TO-263 Top View

Figure 3. Basic Functional Diagram, Adjustable

Figure 4. Application Circuit

Version

1.2V to 15V Adjustable Regulator

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 © 1999–2013, 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.