Texas Instruments LM2940CT-12/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) | 12V |
| 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-12/NOPB is a robust 1A low dropout linear regulator from Texas Instruments, delivering a fixed 12V output. Its low dropout voltage of 0.8V and excellent 66dB ripple rejection make it ideal for automotive, industrial, and audio applications. The TO-220 package ensures efficient heat dissipation for continuous operation.
- High Current Capacity: 1A output supports power-hungry loads while maintaining regulation.
- Low Dropout: 0.8V dropout maximizes efficiency in 12V systems with tight headroom.
- Excellent Ripple Rejection: 66dB PSRR at 120Hz ensures clean output for sensitive analog circuits.
- Thermal Protection: Built-in thermal shutdown and current limiting protect the device and load.
Automotive Power Supplies
The 12V fixed output and 1A current capability make it ideal for powering automotive sensors, microcontrollers, and infotainment systems directly from a 12V battery rail, withstanding load-dump transients up to 60V.
Industrial Control Systems
With a low dropout of 0.8V and 66dB PSRR at 120Hz, it provides clean, stable 12V rails for PLCs, motor controllers, and industrial sensors, rejecting mains-frequency ripple.
Telecom and Networking Equipment
Its 1A output and robust thermal performance in TO-220 package suit it for powering RF modules, Ethernet switches, and baseband processors requiring a regulated 12V supply.
Battery-Powered Devices
The low quiescent current (10 mA) and dropout voltage extend battery life in portable instruments, providing a regulated 12V from a 13-14V battery pack.
Audio and Precision Analog Circuits
The high PSRR (66dB) and low output noise make it suitable for powering op-amps, DACs, and audio preamplifiers where a quiet 12V rail is critical.
Test and Measurement Equipment
Its stable output and thermal shutdown protection ensure reliable operation in benchtop multimeters, oscilloscopes, and signal generators requiring a precise 12V reference.
- Q: What is the fixed output voltage of the LM2940CT-12/NOPB?
- A: The LM2940CT-12/NOPB provides a fixed 12V output.
- 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 12V up to 26V, with a typical dropout of 0.8V at 1A load.
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 0.8V at 1A output current.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA.
- Q: What package is available?
- A: It is available in a TO-220-3 package.
LM2940CT-12/NOPB.pdf
- Q: What is the fixed output voltage of the LM2940CT-12/NOPB?
- A: The LM2940CT-12/NOPB provides a fixed 12V output.
- 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 12V up to 26V, with a typical dropout of 0.8V at 1A load.
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 0.8V at 1A output current.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA.
- Q: What package is available?
- A: It is available in a TO-220-3 package.
