LM2937IMP-15 Texas Instruments Integrated Circuit (Other) In Stock
LM2937IMP-15 is a fixed 15 V output LDO linear voltage regulator from Texas Instruments in a SOT-223 (3-pin) package. It accepts inputs from 17 V to 26 V with a maximum dropout of 1 V and typical line and load regulation of 0.15%. Available globally for automotive and industrial post-regulation power supply designs.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 4
- Lifecycle
- OBSOLETE
- Datasheet
- LM2937IMP-15 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM2937IMP-15?
- Fixed 15 V output with tight line and load regulation of 0.15% for stable supply rails
- Input voltage range from 17 V to 26 V with a maximum dropout voltage of only 1 V
- SOT-223 (3-pin) surface-mount package with exposed pad for efficient heat dissipation
- Suited for automotive applications with 26 V absolute maximum input rating
What is LM2937IMP-15 used for?
LM2937IMP-15 provides a regulated 15 V rail in automotive infotainment systems and dashboard electronics powered from 24 V truck or commercial-vehicle power buses. Its low dropout characteristic and tight regulation make it suitable as a linear post-regulator following a switching supply in industrial sensor transmitters that require a clean 15 V analog reference rail. The device is also used in test and measurement instrument power trees where a stable 15 V source feeds precision operational amplifiers and DAC reference circuits.
What are the specifications of LM2937IMP-15?
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1V |
| Dropout Voltage1-Nom | 0.5V |
| Input Voltage Absolute-Max | 26V |
| Input Voltage-Max | 26V |
| Input Voltage-Min | 17V |
| JESD-30 Code | R-PDSO-G3 |
| Line Regulation-Max | 0.15% |
| Load Regulation-Max | 0.15% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 85°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 15.75V |
| Output Voltage1-Min | 14.25V |
| Output Voltage1-Nom | 15V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.3mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 5% |
| 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 LM2937IMP-15 datasheet?
LM2937IMP-15 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM2937IMP-15?
Compatible alternatives and drop-in replacements for LM2937IMP-15:
Regulator, 15V, 1V Dropout, BIPolar, PDSO4
Frequently Asked Questions
What input voltage range does the LM2937IMP-15 require for proper 15 V regulation?
The LM2937IMP-15 requires an input voltage between 17 V minimum and 26 V absolute maximum to maintain its fixed 15 V output. With a nominal dropout of 0.5 V and a maximum dropout of 1 V at full load, the minimum usable input is 16 V under light load, making it well suited for 24 V industrial or automotive power rails.
How precise is the output regulation of LM2937IMP-15 under varying load and line conditions?
LM2937IMP-15 achieves a maximum line regulation of 0.15 % and a maximum load regulation of 0.15 %, meaning the 15 V output varies by no more than 22.5 mV across the full input and load range. This level of stability is suitable for driving precision analog circuits such as op-amp rails and 4–20 mA transmitter power supplies.
For a 24 V truck power bus application, is the LM2937IMP-15 protected against voltage transients?
The LM2937IMP-15 has an absolute maximum input rating of 26 V. While this covers the nominal 24 V bus, automotive load-dump transients can spike above 26 V, so an external transient voltage suppressor (TVS) rated below 26 V is recommended. The SOT-223 package provides a thermal pad that helps dissipate the power difference between 24 V input and 15 V output at the rated load current.
How does the SOT-223 package of LM2937IMP-15 compare to a TO-92 package for thermal management?
The SOT-223 package features an exposed metal tab that can be soldered to a PCB copper pour, achieving a junction-to-board thermal resistance near 15 °C/W with adequate copper area. A TO-92 package typically has junction-to-ambient thermal resistance above 180 °C/W. For LM2937IMP-15 running at 11 V input-to-output difference, the SOT-223 handles significantly higher currents without an external heatsink.
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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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