Texas Instruments LM2940SX-10/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $4.08 | $4.08 |
| 15+ | $1.89 | $28.35 |
| 25+ | $1.85 | $46.25 |
| 50+ | $1.74 | $87.00 |
| 100+ | $1.54 | $154.00 |
| N+ | $0.31 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 26V |
| Voltage - Output (Min/Fixed) | 10V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 1V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | 15 mA |
| PSRR | 63dB (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-10/NOPB from National Semiconductor is a robust 1A low-dropout linear regulator with a fixed 10V output. It operates from input voltages up to 26V, making it ideal for automotive and industrial applications. The 1V dropout voltage and 10mA quiescent current ensure efficient operation. Housed in a TO-263 (DDPAK-3) package, it offers excellent thermal dissipation. With 63dB PSRR at 120Hz, it provides clean, stable power for noise-sensitive circuits.
- Wide Input Range: Accepts up to 26V, providing flexibility for automotive and industrial power rails with transient spikes.
- High Ripple Rejection: 63dB PSRR at 120Hz effectively filters mains-frequency ripple, ensuring clean DC output.
- Thermal Efficiency: The TO-263 package dissipates heat effectively, supporting 1A continuous load without overheating.
- Proven Reliability: Designed for harsh environments, it offers built-in protection against overcurrent and thermal overload.
Automotive Electronics
With a 26V input capability and 1A output, it regulates 12V battery power down to 10V for sensors, ECUs, and infotainment systems, withstanding load-dump transients.
Industrial Power Supplies
Use it as a post-regulator for 12V or 15V rails to provide a clean 10V supply for analog control circuits, op-amps, and motor drivers in factory automation.
Telecom Base Stations
The 63dB PSRR at 120Hz effectively filters rectified AC ripple, making it suitable for powering RF amplifier bias circuits in base station equipment.
Audio Amplifier Pre-Regulation
Its low noise and high current capability make it ideal for powering preamp stages in car audio systems, ensuring clean 10V rails for high-fidelity sound.
Battery Charging Circuits
In lead-acid battery chargers, this LDO provides a stable 10V reference for charging control logic, ensuring accurate voltage regulation.
HVAC Control Boards
It powers 10V valve actuators and display drivers in thermostats, with the TO-263 package providing excellent thermal performance for continuous operation.
- Q: What is the output voltage of the LM2940SX-10/NOPB?
- A: The fixed output voltage is 10V.
- Q: What is the maximum output current?
- A: It can deliver up to 1A of continuous current.
- Q: What is the input voltage range?
- A: The input voltage range is from 11V to 26V (typical).
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 1V at 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10mA.
- Q: What package is available?
- A: It comes in a TO-263 (DDPAK-3) package.
LM2940SX-10/NOPB.pdf
- Q: What is the output voltage of the LM2940SX-10/NOPB?
- A: The fixed output voltage is 10V.
- Q: What is the maximum output current?
- A: It can deliver up to 1A of continuous current.
- Q: What is the input voltage range?
- A: The input voltage range is from 11V to 26V (typical).
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 1V at 1A load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10mA.
- Q: What package is available?
- A: It comes in a TO-263 (DDPAK-3) package.
