Texas Instruments LP2981IM5-5.0
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $3.20 | $3.20 |
| 15+ | $1.51 | $22.65 |
| 25+ | $1.48 | $37.00 |
| 50+ | $1.39 | $69.50 |
| 100+ | $1.23 | $123.00 |
| N+ | $0.25 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Marketplace | Cut Tape (CT) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 16V |
| Voltage - Output (Min/Fixed) | 5V |
| 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 LP2981IM5-5.0 from National Semiconductor is a precision LDO regulator delivering a fixed 5V output at up to 100mA. Its standout features include an ultra-low quiescent current of 95 µA and a dropout voltage of just 0.37V at full load. The SOT-23-5 package is perfect for space-constrained designs. With 63dB PSRR at 1kHz, it effectively filters input noise, making it ideal for battery-powered and noise-sensitive applications.
- Ultra-Low Quiescent Current: 95 µA extends battery life in portable devices.
- High PSRR: 63dB at 1kHz rejects supply noise for clean output.
- Low Dropout: 0.37V at 100mA allows operation from nearly depleted batteries.
- Compact SOT-23-5: Ideal for miniaturized PCB designs.
Battery-Powered Wearables
The LP2981IM5-5.0's ultra-low 95 µA quiescent current extends battery life in fitness trackers and smartwatches, providing a stable 5V rail for sensors.
Portable Medical Devices
Glucose monitors and pulse oximeters require clean power. This LDO's high PSRR (63dB at 1kHz) ensures accurate readings by rejecting supply noise.
Wireless IoT Modules
For Zigbee, BLE, and LoRa modules, the 100mA output is sufficient for RF transceivers, while the low dropout maintains regulation during battery discharge.
Audio Codec Power
In portable audio players, the LP2981IM5-5.0 powers codecs and DACs, with its low noise and high PSRR preserving audio fidelity.
Sensor Signal Conditioning
Precision analog sensors benefit from a quiet 5V supply. The low quiescent current and high PSRR minimize interference.
Memory Backup Circuits
For SRAM or RTC backup, this LDO provides a stable 5V supply with minimal current draw, preserving data during main power loss.
- Q: What is the output voltage of the LP2981IM5-5.0?
- A: It provides a fixed 5.0V output.
- 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 is 5V, which is the nominal input for this fixed-output version.
- Q: What is the dropout voltage?
- A: Dropout is 0.37V at 100mA, enabling low headroom operation.
- Q: What is the quiescent current?
- A: Quiescent current is only 95 µA, making it ideal for battery-powered devices.
- Q: What is the PSRR?
- A: It offers 63dB of power supply rejection at 1kHz, filtering noise effectively.
LP2981IM5-5.0.pdf
- Q: What is the output voltage of the LP2981IM5-5.0?
- A: It provides a fixed 5.0V output.
- 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 is 5V, which is the nominal input for this fixed-output version.
- Q: What is the dropout voltage?
- A: Dropout is 0.37V at 100mA, enabling low headroom operation.
- Q: What is the quiescent current?
- A: Quiescent current is only 95 µA, making it ideal for battery-powered devices.
- Q: What is the PSRR?
- A: It offers 63dB of power supply rejection at 1kHz, filtering noise effectively.
