National Semiconductor LP2981IM5-4.0
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.96 | $0.96 |
| 15+ | $0.22 | $3.30 |
| 25+ | $0.22 | $5.50 |
| 50+ | $0.20 | $10.00 |
| 100+ | $0.18 | $18.00 |
| N+ | $0.04 | 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) | 16V |
| Voltage - Output (Min/Fixed) | 4V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.37V @ 100mA |
| Current - Output | 100mA |
| Current - Quiescent (Iq) | 95 µA |
| Current - Supply (Max) | 1.7 mA |
| PSRR | 63dB (1kHz) |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
The LP2981IM5-4.0 is a fixed 4.0V low dropout linear regulator from National Semiconductor, delivering up to 100mA of output current. Its ultra-low 95µA quiescent current and 0.37V dropout voltage make it an excellent choice for battery-powered and portable applications. The SOT-23-5 package saves board space while providing 63dB PSRR at 1kHz for clean, stable power delivery.
- Extended Battery Life: Ultra-low 95µA quiescent current minimizes standby power consumption.
- High Efficiency at Low Dropout: 0.37V dropout at 100mA allows operation from nearly depleted batteries.
- Clean Output: 63dB PSRR at 1kHz reduces supply noise for sensitive analog circuits.
- Compact Footprint: SOT-23-5 package fits space-constrained PCB designs.
Battery-Powered Portable Devices
The 95µA quiescent current and 100mA output make it ideal for extending battery life in handheld instruments, remote controls, and wearable sensors.
Precision Analog Reference Supply
With 63dB PSRR at 1kHz, it effectively filters power supply noise for op-amps, ADCs, and DACs requiring a clean 4.0V rail.
Microcontroller Power Supply
Provides a stable 4.0V supply for low-power MCUs, ensuring reliable operation even with fluctuating battery voltage.
Wireless Module Regulation
The low dropout of 0.37V at 100mA allows efficient regulation from a 4.5V battery to 4.0V for RF modules, minimizing power loss.
Sensor Interface Circuits
Stable output and low noise characteristics support precision sensor signal conditioning in industrial and medical applications.
Automotive Interior Electronics
Compact SOT-23-5 package and robust performance suit space-constrained automotive infotainment and telematics modules.
- Q: What is the output voltage of the LP2981IM5-4.0?
- A: The fixed output voltage is 4.0V.
- Q: What is the maximum output current?
- A: It can deliver up to 100mA.
- Q: What is the input voltage range?
- A: The input voltage must be at least 4V (plus dropout) for proper regulation.
- Q: What is the dropout voltage?
- A: Dropout is typically 0.37V at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 95µA, ideal for battery-powered devices.
- Q: What package is available?
- A: It comes in a compact SOT-23-5 package.
LP2981IM5-4.0.pdf
- Q: What is the output voltage of the LP2981IM5-4.0?
- A: The fixed output voltage is 4.0V.
- Q: What is the maximum output current?
- A: It can deliver up to 100mA.
- Q: What is the input voltage range?
- A: The input voltage must be at least 4V (plus dropout) for proper regulation.
- Q: What is the dropout voltage?
- A: Dropout is typically 0.37V at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 95µA, ideal for battery-powered devices.
- Q: What package is available?
- A: It comes in a compact SOT-23-5 package.
