SNVS038H July 1999 – January 2015 LM1085
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1 1.2-V to 15-V Adjustable Regulator
- 8.2.2 Adjustable at 5 V
- 8.2.3 5-V Regulator with Shutdown
- 8.2.4 Battery Charger
- 8.2.5 Adjustable Fixed Regulator
- 8.2.6 Regulator with Reference
- 8.2.7 High Current Lamp Driver Protection
- 8.2.8 Battery Backup Regulated Supply
- 8.2.9 Ripple Rejection Enhancement
- 8.2.10 Automatic Light Control
- 8.2.11 Generating Negative Supply Voltage
- 8.2.12 Remote Sensing
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
- KTT|3
Orderable Information
1 Features
- Available in 3.3-V, 5.0-V, 12-V and Adjustable Versions
- Current Limiting and Thermal Protection
- Output Current 3 A
- Line Regulation 0.015% (typical)
- Load Regulation 0.1% (typical)
2 Applications
- High Efficiency Linear Regulators
- Battery Charger
- Post Regulation for Switching Supplies
- Constant Current Regulator
- Microprocessor Supply
3 Description
The LM1085 is a regulator with a maximum dropout of 1.5 V at 3 A of load current. It has the same pin-out as TI's industry standard LM317.
Two resistors are required to set the output voltage of the adjustable output voltage version of the LM1085. Fixed output voltage versions integrate the adjust resistors.
The LM1085 circuit includes a zener trimmed bandgap reference, current limiting and thermal shutdown.
Refer to the LM1084 for the 5A version, and the LM1086 for the 1.5A version.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM1085 | DDPAK/TO-263 (3) | 10.18 mm × 8.41 mm |
| TO-220 (3) | 14.986 mm × 10.16 mm |
- For all available packages, see the orderable addendum at the end of the datasheet.
Typical Application
