Datasheet
LM1085
www.ti.com
SNVS038G –JULY 1999–REVISED MARCH 2013
LM1085 3A Low Dropout Positive Regulators
Check for Samples: LM1085
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FEATURES
DESCRIPTION
The LM1085 is a series of low dropout positive
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• 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
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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.