Texas Instruments LM2940CSX-12/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.93 | $1.93 |
| 15+ | $1.87 | $28.05 |
| 25+ | $1.83 | $45.75 |
| 50+ | $1.73 | $86.50 |
| 100+ | $1.52 | $152.00 |
| N+ | $0.30 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Factory | Cut Tape (CT) |
| 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 | Surface Mount |
| Package / Case | TO-263-4, D2PAK (3 Leads + Tab), TO-263AA |
| Supplier Device Package | TO-263 (DDPAK-3) |
| ROHS |  |
The LM2940CSX-12/NOPB from Texas Instruments is a robust 1A low dropout linear regulator delivering a fixed 12V output. Its low 0.8V dropout voltage and wide input range make it ideal for automotive and industrial applications. With 66dB ripple rejection and built-in protection features, it ensures clean, stable power for sensitive electronics.
- High Current Capacity: Delivers up to 1A, suitable for powering multiple loads or high-current devices.
- Low Dropout Voltage: 0.8V dropout at 1A maximizes efficiency and allows operation close to the output voltage.
- Excellent Ripple Rejection: 66dB PSRR at 120Hz filters AC ripple, providing clean DC power.
- Wide Input Range: Handles input voltages up to 26V, accommodating automotive load-dump transients.
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 wide input range and robust thermal performance in the TO-263 package, it provides a clean, regulated 12V supply for PLCs, motor drivers, and industrial sensors operating in noisy environments.
Telecommunications Equipment
Its 66dB PSRR at 120Hz effectively filters ripple from rectified AC lines, ensuring stable 12V power for communication modules, base stations, and networking hardware.
Battery-Powered Backup Systems
The low dropout of 0.8V maximizes battery utilization, allowing a 12V battery to power the regulator until it discharges to approximately 12.8V, extending backup runtime in UPS and emergency systems.
Audio and Precision Analog Circuits
The high PSRR and low output noise make it suitable for powering analog audio circuits, data converters, and precision reference circuits that require a quiet 12V rail.
LED Lighting Drivers
It can regulate 12V for constant-voltage LED strips and lighting controllers, providing consistent brightness and protecting LEDs from input voltage fluctuations.
- Q: What is the output voltage of the LM2940CSX-12/NOPB?
- A: The fixed output voltage is 12V.
- 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 a 1A load, allowing operation with a low input-to-output differential.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA, which is relatively low for a 1A regulator.
- Q: What package is available?
- A: It is available in the TO-263 (DDPAK-3) surface-mount package.
LM2940CSX-12/NOPB.pdf
- Q: What is the output voltage of the LM2940CSX-12/NOPB?
- A: The fixed output voltage is 12V.
- 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 a 1A load, allowing operation with a low input-to-output differential.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA, which is relatively low for a 1A regulator.
- Q: What package is available?
- A: It is available in the TO-263 (DDPAK-3) surface-mount package.
