LM140K-12 Texas Instruments Integrated Circuit (Other) In Stock
LM140K-12 is a fixed 12V positive linear voltage regulator from Texas Instruments. It delivers up to 1A output current with 2.5V dropout voltage, 0.03% line regulation, and 35V max input. From $58.95, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- LM140K-12 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $58.9485(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 12V output with tight ±4% regulation tolerance for stable power supply design
- Low line regulation of 0.03% and load regulation of 0.06% for precision applications
- Supports up to 35V input voltage with internal current limiting and thermal shutdown protection
- Single-function design in TO-3 metal can package for high-power through-hole applications
Applications
The LM140K-12 is widely used in benchtop power supplies, industrial control systems, and audio equipment requiring a stable 12V regulated rail. Its robust TO-3 package and thermal performance make it suitable for high-current linear regulation in legacy and ruggedized hardware designs. It also serves as a reference voltage source in precision analog circuits and measurement instrumentation.
Specifications
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 2.5V |
| Input Voltage Absolute-Max | 35V |
| Input Voltage-Max | 35V |
| Input Voltage-Min | 14.5V |
| JESD-30 Code | O-MBFM-P2 |
| Line Regulation-Max | 0.03% |
| Load Regulation-Max | 0.06% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 150°C |
| Operating Temperature TJ-Min | -55 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 12.6V |
| Output Voltage1-Min | 11.4V |
| Output Voltage1-Nom | 12V |
| Package Body Material | METAL |
| Package Equivalence Code | TO-204/-3 |
| Package Shape | ROUND |
| Package Style | FLANGE MOUNT |
| Packing Method | TRAY |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Form | PIN/PEG |
| Terminal Position | BOTTOM |
| Voltage Tolerance-Max | 4.17% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output voltage and current rating of the LM140K-12?
The LM140K-12 provides a fixed 12V regulated output voltage and can supply up to 1A of continuous output current. It features a nominal dropout voltage of 2.5V, meaning the input must be at least 14.5V to maintain regulation.
What is the input voltage range for the LM140K-12?
The LM140K-12 requires a minimum input voltage of 14.5V and can withstand a maximum input voltage of 35V absolute. Operating within this range ensures stable 12V output with 0.03% line regulation.
What package does the LM140K-12 use and how does it affect thermal performance?
The LM140K-12 uses a TO-3 metal can package (JESD-30 code O-MBFM-P2), which provides excellent thermal conductivity. This package allows effective heat sinking, making it suitable for high-power applications requiring sustained 1A output in industrial and audio equipment.
What are common applications for the LM140K-12?
Common applications include industrial power supplies, audio amplifier bias rails, precision analog instrumentation, and legacy embedded systems needing a stable 12V regulated source. Its fixed output and robust protection features simplify design in noise-sensitive environments.
Are there drop-in replacements or alternatives for the LM140K-12?
The LM7812 series and LM340-12 are functionally equivalent alternatives offering the same 12V fixed output. For modern designs, low-dropout regulators like the LM1117-12 can replace the LM140K-12 with improved efficiency, though package conversion may be required.
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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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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $58.9485 | $58.95 |
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