Texas Instruments LM2940CT-15/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 15+ | $1.60 | $24.00 |
| 25+ | $1.57 | $39.25 |
| 50+ | $1.48 | $74.00 |
| 100+ | $1.31 | $131.00 |
| N+ | $0.26 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Tube | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 26V |
| Voltage - Output (Min/Fixed) | 15V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.8V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | 15 mA |
| PSRR | 66dB (120Hz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
| Operating Temperature | 0°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | TO-220-3 |
| Supplier Device Package | TO-220-3 |
| ROHS |  |
The LM2940CT-15/NOPB is a fixed 15V low-dropout regulator from Texas Instruments, delivering up to 1A. Its standout feature is a dropout voltage of only 0.8V at 1A, significantly lower than standard 78xx regulators. This makes it ideal for battery-powered and automotive applications where input voltage is close to the output. The TO-220-3 package provides excellent thermal performance, and the 66dB PSRR ensures clean output.
- Low Dropout: 0.8V at 1A enables operation from lower input voltages.
- High Current: 1A output for demanding loads.
- Automotive Compatible: Handles 26V input transients.
- TO-220 Package: Easy heatsinking for high-power applications.
Automotive Electronics
Regulates 15V from a 12V battery system (with boost) or 24V truck systems. The 0.8V dropout ensures regulation even during cranking voltage dips.
Battery-Powered Backup Systems
Maintains 15V output as battery voltage drops. Low dropout extends usable battery capacity in UPS and emergency lighting.
Industrial Sensor Power
Provides stable 15V for precision sensors and transmitters. The 66dB PSRR at 120Hz filters line noise in factory environments.
Audio Equipment
Delivers clean 15V for preamplifiers and crossovers. Low dropout reduces heat dissipation in enclosed audio gear.
Telecom Power Supplies
Powers 15V interface circuits in base stations and routers. The 1A current handles multiple line drivers.
Portable Test Instruments
Regulates battery voltage for handheld multimeters and calibrators. The low dropout allows operation from 16V batteries.
- Q: What is the output voltage of the LM2940CT-15/NOPB?
- A: The fixed output voltage is 15V DC.
- Q: What is the maximum output current?
- A: It can deliver up to 1A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 15.8V up to 26V.
- Q: What is the dropout voltage?
- A: The dropout voltage is very low at 0.8V at 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA.
- Q: What package is available?
- A: It comes in a TO-220-3 through-hole package.
LM2940CT-15/NOPB.pdf
- Q: What is the output voltage of the LM2940CT-15/NOPB?
- A: The fixed output voltage is 15V DC.
- Q: What is the maximum output current?
- A: It can deliver up to 1A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 15.8V up to 26V.
- Q: What is the dropout voltage?
- A: The dropout voltage is very low at 0.8V at 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA.
- Q: What package is available?
- A: It comes in a TO-220-3 through-hole package.
