Texas Instruments LM2940S-12/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $2.34 | $2.34 |
| 15+ | $2.26 | $33.90 |
| 25+ | $2.21 | $55.25 |
| 50+ | $2.09 | $104.50 |
| 100+ | $1.85 | $185.00 |
| N+ | $0.37 | 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) | 1V @ 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 | -40°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-263-4, D2PAK (3 Leads + Tab), TO-263AA |
| Supplier Device Package | TO-263 (DDPAK-3) |
| ROHS |  |
The Texas Instruments LM2940S-12/NOPB is a robust 1A LDO voltage regulator providing a fixed 12V output. Designed for automotive and industrial applications, it operates over a wide input voltage range and features a low dropout voltage of 1V at full load. With a PSRR of 66dB at 120Hz, it effectively suppresses mains-frequency ripple. The TO-263 (DDPAK-3) package ensures excellent heat dissipation, making it a dependable choice for high-current power management.
- High Output Current: Delivers up to 1A, suitable for powering multiple circuits or higher-power loads.
- Low Dropout: 1V dropout at 1A allows operation with minimal input-to-output voltage difference, improving efficiency.
- Excellent Ripple Rejection: 66dB PSRR at 120Hz filters AC ripple, providing clean DC power for sensitive electronics.
- Robust Package: TO-263 (DDPAK-3) package offers superior thermal performance for reliable operation at high currents.
Automotive Audio Amplifiers
The LM2940S-12/NOPB provides a stable 12V rail for car audio amplifiers. Its 1A output current can drive preamp stages, while the 66dB PSRR at 120Hz effectively filters alternator whine, ensuring clean audio.
Industrial Control Systems
In industrial PLCs, this regulator powers 12V logic and interface circuits. The 1A current capability supports multiple I/O modules, and the TO-263 package allows for reliable operation in high-temperature environments.
Telecom Power Supplies
For telecom equipment, the LM2940S-12 converts a 15V or 24V bus down to a clean 12V rail. The low dropout of 1V at 1A ensures efficient operation even when the input voltage sags.
Battery Charging Circuits
This LDO can be used in 12V lead-acid battery charging circuits to provide a regulated supply for the charging controller. Its robust design handles input transients from the battery.
Test and Measurement Equipment
The high output current and low noise make it suitable for powering analog circuits in benchtop instruments. The 12V fixed output is a common rail for op-amps and precision references.
- Q: What is the output voltage of the LM2940S-12/NOPB?
- A: It provides a fixed 12V output.
- Q: What is the maximum output current?
- A: This LDO can supply up to 1A of load current.
- Q: What is the input voltage range?
- A: The input voltage range is from 12V to 26V, suitable for 12V automotive systems.
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 1V at a 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA, which is relatively high but acceptable for high-current applications.
- Q: What package is available?
- A: It is available in a TO-263 (DDPAK-3) package for excellent thermal performance.
LM2940S-12/NOPB.pdf
- Q: What is the output voltage of the LM2940S-12/NOPB?
- A: It provides a fixed 12V output.
- Q: What is the maximum output current?
- A: This LDO can supply up to 1A of load current.
- Q: What is the input voltage range?
- A: The input voltage range is from 12V to 26V, suitable for 12V automotive systems.
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 1V at a 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA, which is relatively high but acceptable for high-current applications.
- Q: What package is available?
- A: It is available in a TO-263 (DDPAK-3) package for excellent thermal performance.
