Texas Instruments LM2940IMP-15/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 15+ | $1.50 | $22.50 |
| 25+ | $1.47 | $36.75 |
| 50+ | $1.39 | $69.50 |
| 100+ | $1.22 | $122.00 |
| N+ | $0.24 | 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) | 15V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 1V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | 15 mA |
| PSRR | - |
| Control Features | - |
| Protection Features | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
| Operating Temperature | -40°C ~ 85°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-261-4, TO-261AA |
| Supplier Device Package | SOT-223-4 |
| ROHS |  |
The LM2940IMP-15/NOPB is a fixed 15V low dropout linear regulator from Texas Instruments, capable of delivering 1A of output current. Housed in a compact SOT-223-4 package, it features a typical dropout voltage of just 1V at full load, making it ideal for battery-powered and automotive applications where headroom is limited. With a quiescent current of 10 mA, it balances efficiency with stable regulation for industrial and consumer electronics.
- High Current Capacity: 1A output supports power-hungry loads like sensors and microcontrollers without external pass transistors.
- Low Dropout Voltage: 1V typical dropout at 1A enables operation from supplies with minimal headroom, extending battery life.
- Fixed 15V Output: Eliminates external resistor dividers, simplifying design and improving accuracy.
- Compact SOT-223 Package: Saves PCB space while providing adequate thermal dissipation for 1A loads.
Automotive Power Supplies
The 15V fixed output and 1A capability make it suitable for powering automotive sensors and actuators that require a stable 15V rail from a 16-26V battery supply, with the low dropout ensuring operation during cold-crank conditions.
Industrial Control Systems
Use it to provide a clean 15V supply for analog circuits, op-amps, and microcontrollers in industrial PLCs and process control equipment, where the 1A current handles multiple loads simultaneously.
Telecommunications Equipment
Ideal for powering RF transceivers and baseband processors that need a low-noise 15V supply, the LM2940's low output impedance and fast transient response maintain signal integrity.
Battery-Powered Devices
For 15V battery stacks (e.g., 12-cell NiMH), the 1V dropout extends usable battery life by allowing discharge down to 16V before regulation is lost, maximizing runtime.
Test and Measurement Instruments
Provide a stable reference rail for precision DACs and ADCs in bench instruments, where the 10 mA quiescent current and low output noise contribute to measurement accuracy.
Audio Equipment
Power preamplifier stages and audio codecs with a clean 15V supply, reducing hum and noise through the regulator's ripple rejection and stable output.
- Q: What is the output voltage of the LM2940IMP-15/NOPB?
- A: The fixed output voltage is 15V.
- 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 15V plus the dropout voltage, typically up to 26V absolute maximum.
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 1V at 1A load current.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: It comes in a SOT-223-4 package.
LM2940IMP-15/NOPB.pdf
- Q: What is the output voltage of the LM2940IMP-15/NOPB?
- A: The fixed output voltage is 15V.
- 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 15V plus the dropout voltage, typically up to 26V absolute maximum.
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 1V at 1A load current.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: It comes in a SOT-223-4 package.
