LM2940CT-12In StockTexas Instruments
LM2940CT-12 is a 1A fixed 12V LDO linear voltage regulator with 0.5V typical dropout voltage and up to 26V input. From $0.90, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- LM2940CT-12 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9000(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 12V output with ±1% accuracy for stable power regulation
- Low 0.5V typical dropout voltage, 1V max — ideal for battery-powered designs
- 1A output current capability with internal current limiting and thermal shutdown
- Wide input voltage range: 13.6V to 26V (absolute max 45V)
- Reverse battery protection and over-temperature shutdown for robust system safety
Applications
The LM2940CT-12 is widely used in automotive electronics, industrial control systems, and consumer devices requiring a stable 12V regulated supply. Its low dropout voltage makes it suitable for battery-operated equipment and post-regulation of switching supplies. Typical applications include microcontroller power rails, sensor power supplies, and 12V bus regulation in embedded systems.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1995-01-01 |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1V |
| Dropout Voltage1-Nom | 0.5V |
| Input Voltage Absolute-Max | 45V |
| Input Voltage-Max | 26V |
| Input Voltage-Min | 13.6V |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e0 |
| Line Regulation-Max | 0.12% |
| Load Regulation-Max | 0.12% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 12.6V |
| Output Voltage1-Min | 11.4V |
| Output Voltage1-Nom | 12V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | NOT APPLICABLE |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT APPLICABLE |
| Voltage Tolerance-Max | 5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM2940CT-12:
Regulator, 12V, 1V Dropout, BIPolar, PSFM3
Regulator, 12V, 1V Dropout, BIPolar, PSFM3
Frequently Asked Questions
What is the output voltage and current rating of the LM2940CT-12?
The LM2940CT-12 provides a fixed 12V regulated output with a maximum output current of 1A. It features ±1% output voltage accuracy and is designed for applications requiring a stable 12V power supply.
What is the dropout voltage of the LM2940CT-12?
The LM2940CT-12 has a typical dropout voltage of 0.5V and a maximum of 1V at full load. This low dropout characteristic allows it to regulate 12V output even when the input voltage is as low as 13.6V, making it suitable for battery-powered and efficiency-sensitive applications.
What are typical applications for the LM2940CT-12?
The LM2940CT-12 is commonly used in automotive electronics, industrial control boards, embedded systems, and consumer electronics. It is ideal for powering 12V microcontroller systems, sensor modules, relay drivers, and post-regulation stages where a clean, stable 12V rail is required.
What package type does the LM2940CT-12 come in and what are alternative compatible parts?
The LM2940CT-12 comes in a TO-220 (3-pin) through-hole package, well-suited for PCB mounting with heatsinking. Compatible alternatives include the LM7812 and LP2940 series. The -12 suffix denotes the fixed 12V output version of the LM2940 family from Texas Instruments.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.1563 | $2.16 |
| 3+ | $1.8000 | $5.40 |
| 13+ | $1.3500 | $17.55 |
| 39+ | $1.1250 | $43.88 |
| 51+ | $0.9000 | $45.90 |
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