LM1084IS-12 Texas Instruments Integrated Circuit (Other) In Stock
The LM1084IS-12 is a fixed 12V, 5A low-dropout positive linear regulator by Texas Instruments with a maximum dropout voltage of 1.5V. It accepts input voltages from 13.5V to 25V and provides tight 0.025% line regulation and 0.072% load regulation. Available in a 3-lead TO-263 (D-PAK) package with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 4
- Lifecycle
- OBSOLETE
- Datasheet
- LM1084IS-12 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM1084IS-12?
- Fixed 12V output with 5A current capability and 1.5V maximum dropout voltage for efficient LDO regulation
- Tight 0.025% line regulation and 0.072% load regulation ensuring stable output under varying load conditions
- Input voltage range of 13.5V to 25V compatible with automotive and industrial DC bus applications
- 3-lead D-PAK (TO-263) surface-mount package provides excellent thermal dissipation on PCB copper pours
What is LM1084IS-12 used for?
The LM1084IS-12 is used in industrial power supplies, automotive accessories, and test equipment requiring a stable, regulated 12V rail from an unregulated or loosely regulated DC input up to 25V. Its 5A current capacity and low 1.5V dropout voltage make it suitable for powering fans, relays, sensors, and communication modules in embedded systems. The D-PAK package allows effective heat sinking through PCB copper area, enabling compact thermal management without an external heatsink in moderate-load designs.
What are the specifications of LM1084IS-12?
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1.5V |
| Dropout Voltage1-Nom | 1.3V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 25V |
| Input Voltage-Min | 13.5V |
| JESD-30 Code | R-PSSO-G3 |
| Line Regulation-Max | 0.025% |
| Load Regulation-Max | 0.072% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 5A |
| Output Voltage1-Max | 12.24V |
| Output Voltage1-Min | 11.76V |
| Output Voltage1-Nom | 12V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP3H,.55TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | RAIL |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 2% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM1084IS-12 datasheet?
LM1084IS-12 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM1084IS-12?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage and current rating does the LM1084IS-12 provide?
The LM1084IS-12 delivers a fixed 12V output at up to 5A continuous current with a maximum dropout voltage of 1.5V. This combination makes it suitable for powering 12V loads such as relays, fans, and communication modules from a 13.5V to 25V DC input rail with minimal heat dissipation at moderate load currents.
How does the LM1084IS-12 perform in automotive or industrial power conditioning roles?
With an input voltage range of 13.5V to 25V and tight 0.025% line regulation, the LM1084IS-12 maintains a stable 12V output despite input voltage fluctuations typical in automotive 14V or 24V bus systems. Its 0.072% load regulation ensures the output remains within specification from no load to the full 5A rating, critical for sensor and analog circuit power rails.
What thermal management approach suits the LM1084IS-12 at higher output currents?
The 3-lead D-PAK (TO-263) package allows the exposed metal tab to be soldered directly to a PCB copper pour or thermal pad, transferring heat without a separate heatsink for load currents up to approximately 3A in typical ambient conditions. At the full 5A rating, a copper pour area of at least 10 cm² or an external heatsink clip is recommended to keep junction temperature below the 125°C maximum.
When would a designer choose the LM1084IS-12 over a switching regulator for a 12V rail?
The LM1084IS-12 is preferred when low output noise, fast transient response, and simple 3-component design outweigh efficiency concerns. In audio equipment power supplies, analog sensor rails, or lab instruments requiring clean 12V with under 50 µV RMS noise, the LDO's absence of switching harmonics is a significant advantage over a buck converter despite the higher power dissipation.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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