National Semiconductor LM2940LD-12-NS
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $5.80 | $5.80 |
| 15+ | $1.33 | $19.95 |
| 25+ | $1.31 | $32.75 |
| 50+ | $1.23 | $61.50 |
| 100+ | $1.09 | $109.00 |
| N+ | $0.22 | 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) | 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 | 8-WDFN Exposed Pad |
| Supplier Device Package | 8-WSON (4x4) |
The LM2940LD-12-NS is a fixed 12V low dropout linear regulator from National Semiconductor, capable of delivering 1A. With a typical dropout of 1V and 66dB PSRR at 120Hz, it is well-suited for automotive and industrial applications. The 8-WSON (4x4mm) package provides excellent thermal performance in a compact footprint.
- High Voltage Operation: Handles input voltages up to 26V, ideal for automotive and industrial environments.
- 1A Output Current: Supports a wide range of loads, from sensors to small motors.
- Good Ripple Rejection: 66dB PSRR at 120Hz filters AC ripple effectively.
- Compact Thermal Package: 8-WSON package dissipates heat efficiently in space-limited designs.
Automotive Battery Regulation
Regulates 12V from a car battery (nominal 13.8V) to power ECUs, sensors, and infotainment systems with 1A capability.
Industrial 12V Rails
Provides a clean 12V supply for industrial controllers, relays, and analog circuits from unregulated 15V sources.
Audio Amplifier Pre-Regulation
The 66dB PSRR at 120Hz reduces mains hum in audio preamplifiers and mixers.
Telecom Power Supplies
Converts 15V intermediate bus voltages to stable 12V for line cards and communication modules.
Test and Measurement Equipment
Powers precision 12V references and analog front-ends in bench instruments.
LED Lighting Drivers
Provides a regulated 12V rail for LED strips and lighting controllers, ensuring consistent brightness.
- Q: What is the output voltage of the LM2940LD-12-NS?
- A: It provides a fixed 12V output voltage.
- Q: What is the maximum output current?
- A: The LM2940 can deliver up to 1A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 12V (minimum) up to 26V (absolute maximum).
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 1V at 1A load, requiring a minimum input of 13V for regulation.
- Q: What is the quiescent current?
- A: The quiescent current is 10mA, which is typical for high-voltage LDOs.
- Q: What is the PSRR performance?
- A: It offers 66dB power supply rejection at 120Hz, filtering rectified AC ripple effectively.
LM2940LD-12-NS.pdf
- Q: What is the output voltage of the LM2940LD-12-NS?
- A: It provides a fixed 12V output voltage.
- Q: What is the maximum output current?
- A: The LM2940 can deliver up to 1A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 12V (minimum) up to 26V (absolute maximum).
- Q: What is the dropout voltage?
- A: The typical dropout voltage is 1V at 1A load, requiring a minimum input of 13V for regulation.
- Q: What is the quiescent current?
- A: The quiescent current is 10mA, which is typical for high-voltage LDOs.
- Q: What is the PSRR performance?
- A: It offers 66dB power supply rejection at 120Hz, filtering rectified AC ripple effectively.
