Texas Instruments LP2981IM5-3.3/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.09 | $1.09 |
| 15+ | $1.06 | $15.90 |
| 25+ | $1.04 | $26.00 |
| 50+ | $0.98 | $49.00 |
| 100+ | $0.86 | $86.00 |
| N+ | $0.17 | 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) | 16V |
| Voltage - Output (Min/Fixed) | 3.3V |
| 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 |
| ROHS |  |
The LP2981IM5-3.3/NOPB is a precision low-dropout linear regulator from Texas Instruments, delivering a fixed 3.3V output at up to 100mA. Its ultra-low 95 µA quiescent current and 0.37V dropout make it ideal for battery-powered and portable applications. The SOT-23-5 package ensures a compact footprint, while 63dB PSRR at 1kHz provides clean, stable power for noise-sensitive circuits.
- Extended Battery Life: Ultra-low 95 µA quiescent current reduces standby power consumption in portable devices.
- Clean Power Delivery: 63dB PSRR at 1kHz suppresses input ripple, ensuring stable operation for analog and RF circuits.
- Compact Footprint: SOT-23-5 package saves PCB space, ideal for space-constrained designs.
- Low Dropout: 0.37V dropout at full load maximizes efficiency when input voltage is close to output.
Battery-Powered IoT Sensors
The LP2981's low 95 µA quiescent current extends battery life in always-on IoT nodes, while the 3.3V rail powers MCUs and RF transceivers efficiently.
Portable Medical Devices
With 63dB PSRR at 1kHz, this LDO filters noise from switching regulators, ensuring clean power for sensitive analog front-ends in glucose monitors and pulse oximeters.
Wearable Electronics
The SOT-23-5 package and 100mA capability suit compact wearables like smartwatches, providing stable 3.3V for sensors and display drivers.
Automotive Infotainment Backup
For RTC backup or standby power, the LP2981 maintains 3.3V with minimal dropout, preserving settings during main power loss.
Industrial Control Modules
In PLCs and field transmitters, the LDO delivers clean 3.3V to logic ICs, reducing noise-induced errors in 4-20mA loops.
Audio Codec Power
The high PSRR at audio frequencies minimizes supply-induced distortion in portable speakers and headphones.
- Q: What is the output voltage of the LP2981IM5-3.3/NOPB?
- A: The fixed output voltage is 3.3V.
- Q: What is the maximum output current?
- A: The maximum output current is 100mA.
- Q: What is the input voltage range?
- A: The input voltage range is from 3.3V up to 16V (absolute maximum).
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 0.37V at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 95 µA.
- Q: What package is available?
- A: It comes in a SOT-23-5 package.
LP2981IM5-3.3/NOPB.pdf
- Q: What is the output voltage of the LP2981IM5-3.3/NOPB?
- A: The fixed output voltage is 3.3V.
- Q: What is the maximum output current?
- A: The maximum output current is 100mA.
- Q: What is the input voltage range?
- A: The input voltage range is from 3.3V up to 16V (absolute maximum).
- Q: What is the dropout voltage?
- A: The dropout voltage is typically 0.37V at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 95 µA.
- Q: What package is available?
- A: It comes in a SOT-23-5 package.
