National Semiconductor LM2940SX-9.0/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.89 | $0.89 |
| 15+ | $0.86 | $12.90 |
| 25+ | $0.85 | $21.25 |
| 50+ | $0.80 | $40.00 |
| 100+ | $0.71 | $71.00 |
| N+ | $0.14 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 26V |
| Voltage - Output (Min/Fixed) | 9V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 1V @ 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 | -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 LM2940SX-9.0/NOPB is a fixed 9V low dropout linear regulator capable of delivering 1A of output current. With a dropout voltage of just 1V at full load, it efficiently regulates from higher input rails. Its 10 mA quiescent current and 64dB ripple rejection at 120Hz make it a reliable choice for automotive, industrial, and audio applications. Housed in a TO-263 package, it offers robust thermal performance for demanding designs.
- High Current Capacity: Delivers up to 1A, suitable for powering multiple subsystems from a single regulated rail.
- Low Dropout Voltage: 1V dropout at 1A maximizes efficiency in battery and automotive applications.
- Excellent Ripple Rejection: 64dB PSRR at 120Hz ensures clean output for noise-sensitive analog circuits.
- Robust Package: TO-263 (DDPAK-3) provides superior heat dissipation for reliable operation.
Automotive Power Supplies
With a 9V output and 1A capability, this regulator is ideal for powering sensors, microcontrollers, and interface circuits in automotive environments where a stable 9V rail is needed from a 12V battery.
Industrial Control Systems
The 64dB PSRR at 120Hz effectively filters rectified AC ripple, making it suitable for industrial controllers and PLCs that require clean, regulated 9V power.
Battery-Powered Equipment
The low dropout of 1V allows efficient use of battery voltage, extending runtime in portable instruments and backup systems that operate from 9V to 12V sources.
Audio and Measurement Devices
Its low output noise and good ripple rejection make it a solid choice for analog audio circuits and precision measurement equipment requiring a quiet 9V supply.
Networking and Communication Gear
Provides a stable 9V rail for routers, switches, and RF modules, ensuring consistent performance despite input voltage fluctuations.
- Q: What is the output voltage of the LM2940SX-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 at least 1V above the output (dropout) and typically up to 26V.
- Q: What is the dropout voltage?
- A: The dropout voltage is 1V 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-263 (DDPAK-3) package.
LM2940SX-9.0/NOPB.pdf
- Q: What is the output voltage of the LM2940SX-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 at least 1V above the output (dropout) and typically up to 26V.
- Q: What is the dropout voltage?
- A: The dropout voltage is 1V 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-263 (DDPAK-3) package.
