The Texas Instruments LM2940IMP-12/NOPB is a fixed 12 V, 1 A low-dropout positive regulator that brings the LM2940 family into a compact SOT-223 surface-mount package. It accepts a 6 V to 26 V input and exhibits a typical dropout of 0.5 V at full load. With reverse-battery, mirror-image insertion and load-dump protection, this industrial-temp part is rated for -40°C to 85°C, suiting space-constrained and automotive designs alike.
Key Specifications
| Manufacturer | Texas Instruments |
| Exact Manufacturer Part Number | LM2940IMP-12/NOPB |
| Product Category | Power Management – Voltage Regulators |
| Series / Family | LM2940 |
| Package / Case | SOT-223 (DCY), 4-pin |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to 85°C |
| Power Supply | 6 V to 26 V input; 12 V fixed output |
| Output Voltage | 12 V (fixed) |
| Output Current | 1 A |
| Dropout Voltage | 0.5 V typ / 1 V max at 1 A |
| Input Voltage Range | 6 V to 26 V |
| Operating Temperature | -40°C to 85°C |
| Protection | Reverse battery, short-circuit, thermal overload |
| Lifecycle Status | Active |
| Official Documentation | View official documentation |
Key Features
- Fixed 12 V output in a compact SOT-223 surface-mount package
- 1 A output current
- Reverse battery and mirror-image insertion protection
- Internal short-circuit current limiting
- Quiescent current reduction circuit
- Load dump transient protection
Applications
- Automotive auxiliary supplies
- Space-constrained embedded systems
- Industrial sensor rails
- Battery-powered equipment
- Telecom line cards
Sourcing
Availability, lead time, date code and commercial terms are subject to confirmation at the time of quotation.
Quality
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FAQ
What is the difference between the LM2940IMP-12/NOPB and the LM2940CT-12/NOPB?
The IMP-12 is the surface-mount SOT-223 version rated -40°C to 85°C, while the CT-12 is the through-hole TO-220 part rated 0°C to 125°C; both provide a fixed 12 V at 1 A.
Why is the LM2940IMP-12/NOPB rated to 85°C while other LM2940 packages reach 125°C?
The SOT-223 (DCY) package has a lower thermal dissipation limit, so its ambient operating range is specified as -40°C to 85°C.
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