LM2671N-12 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments LM2671N-12 is a high-efficiency PWM step-down switching regulator delivering a fixed 12 V output at up to 500 mA from a 6.5 V to 40 V input, housed in an 8-pin DIP package with shutdown capability. Designed for efficient DC-DC conversion in industrial and bench-top applications. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LM2671N-12 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM2671N-12?
- Fixed 12 V output at up to 500 mA load from a wide 6.5 V to 40 V input covering automotive, 24 V industrial, and 28 V aircraft supply rails
- Voltage-mode PWM control with shutdown pin reduces quiescent current to under 150 µA in standby for battery-backed systems
- 8-pin DIP package with internal power switch simplifies board layout by requiring only 3 external components: inductor, diode, and output capacitor
What is LM2671N-12 used for?
The LM2671N-12 is used in DIN-rail industrial controllers, PLCs, and 24 V field-transmitters that need a regulated 12 V rail for analog circuitry or relay coils from the same bus that powers digital logic at 5 V or 3.3 V. Its 40 V maximum input rating accommodates automotive 36 V start-stop battery transients and load-dump pulses without requiring an upstream TVS clamp in low-current auxiliary circuits. Prototypers and lab instrument builders also appreciate the DIP-8 package for breadboard-compatible switching power supply experiments, replacing inefficient 7812 linear regulators and cutting heat dissipation by over 70% at 24 V input.
What are the specifications of LM2671N-12?
| Pbfree Code | No |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 6.5V |
| Input Voltage-Nom | 24V |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 1.25A |
| Output Voltage-Nom | 12V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 275kHz |
| Technology | NMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM2671N-12 datasheet?
LM2671N-12 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM2671N-12?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LM2671N-12 support, and does it cover 24 V industrial bus rails?
The LM2671N-12 accepts an input voltage from 6.5 V to 40 V, directly covering the 24 V nominal industrial supply, 28 V aircraft power, and 36 V automotive start-stop battery rails; this wide range means a single LM2671N-12 design can serve multiple end-markets without hardware modifications.
How efficient is the LM2671N-12 compared to a linear 7812 regulator at 24 V input delivering 12 V at 500 mA?
A linear 7812 dissipates (24 V - 12 V) x 500 mA = 6 W as heat at 24 V input, requiring a large heatsink; the LM2671N-12 achieves up to 90% conversion efficiency, dissipating less than 0.67 W total, which reduces heatsink size by more than 80% and lowers enclosure temperature by over 15 degrees C in sealed industrial housings.
How many external components does the LM2671N-12 require to build a complete 12 V power supply?
The LM2671N-12 contains an internal MOSFET switch and requires only 3 key external components: a 68 µH to 100 µH inductor, a 1 A Schottky catch diode, and a 100 µF output filter capacitor; this minimal BOM lowers total solution cost by eliminating the gate driver, bootstrap capacitor, and sense resistor needed by discrete switching controller designs.
Does the LM2671N-12 include a shutdown function suitable for power sequencing in multi-rail systems?
Yes—the LM2671N-12 provides a dedicated shutdown (SD) pin that brings quiescent current below 150 µA when pulled low, enabling microcontroller-based power sequencing or supervisory circuits to disable the 12 V rail before the 5 V rail in systems with strict power-on sequencing requirements such as FPGAs or network switches.
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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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