National Semiconductor LM2940CT-9.0/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $3.64 | $3.64 |
| 15+ | $0.84 | $12.60 |
| 25+ | $0.82 | $20.50 |
| 50+ | $0.77 | $38.50 |
| 100+ | $0.68 | $68.00 |
| N+ | $0.14 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Active |
| Output Type | Positive |
| Number of Regulators | Fixed |
| Voltage - Input (Max) | 26V |
| Voltage - Output (Min/Fixed) | 9V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.8V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | 15 mA |
| PSRR | 64dB (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-9.0/NOPB is a fixed 9V low dropout linear regulator capable of delivering 1A of output current. Housed in a TO-220-3 package, it features a dropout voltage of just 0.8V at full load, ensuring efficient operation even with marginal input-to-output voltage differences. With a quiescent current of 10 mA and 64dB PSRR at 120Hz, it provides clean, stable power for a variety of applications.
- High current capability: 1A output supports power-hungry loads while maintaining regulation.
- Low dropout voltage: 0.8V at 1A minimizes power dissipation and allows operation from lower input voltages.
- Excellent ripple rejection: 64dB PSRR at 120Hz ensures clean output for sensitive analog circuits.
- Robust TO-220 package: Facilitates heat dissipation for reliable operation in high-temperature environments.
Automotive Power Supplies
With a 9V fixed output and 1A capability, this regulator is ideal for powering sensors and microcontrollers in automotive environments where a stable 9V rail is needed from a 12V battery.
Industrial Control Systems
The low dropout of 0.8V at 1A ensures efficient operation in industrial equipment where input voltage may sag, maintaining a reliable 9V supply for logic circuits.
Battery-Powered Devices
For 12V battery systems, the LM2940CT-9.0 provides a regulated 9V output with a quiescent current of 10 mA, extending battery life in portable instrumentation.
Audio Equipment
The 64dB PSRR at 120Hz effectively filters power supply noise, making it suitable for analog audio circuits requiring a clean 9V rail.
Networking Equipment
Used in routers and switches to step down 12V to 9V for internal components, the TO-220 package allows for easy heatsinking in continuous operation.
Test and Measurement
Provides a stable 9V reference for calibration equipment, with the 1A current capability supporting multiple test modules simultaneously.
- Q: What is the output voltage of the LM2940CT-9.0/NOPB?
- A: The fixed output voltage is 9V.
- 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 must be higher than 9V plus the dropout voltage; typically up to 26V.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.8V at a 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: It comes in a TO-220-3 package.
LM2940CT-9.0/NOPB.pdf
- Q: What is the output voltage of the LM2940CT-9.0/NOPB?
- A: The fixed output voltage is 9V.
- 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 must be higher than 9V plus the dropout voltage; typically up to 26V.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.8V at a 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: It comes in a TO-220-3 package.
