National Semiconductor LP2981AIBPX-3.3
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.24 | $0.24 |
| 15+ | $0.23 | $3.45 |
| 25+ | $0.23 | $5.75 |
| 50+ | $0.21 | $10.50 |
| 100+ | $0.19 | $19.00 |
| 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) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.375V @ 100mA |
| Current - Output | 100mA |
| Current - Quiescent (Iq) | 125 µA |
| Current - Supply (Max) | 1.5 mA |
| PSRR | 63dB (1kHz) |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
The LP2981AIBPX-3.3 is a fixed 3.3V low dropout linear regulator capable of delivering 100mA. It features a low quiescent current of 125 µA and a dropout voltage of just 0.375V at full load, making it suitable for battery-operated equipment. The SOT-23-5 package supports compact layouts while providing 63dB PSRR at 1kHz for clean power delivery.
- Extended Battery Life: Ultra-low 125 µA quiescent current minimizes standby power draw.
- Clean Output: 63dB PSRR at 1kHz reduces noise for sensitive analog loads.
- Low Dropout: 0.375V dropout at 100mA allows operation from nearly depleted batteries.
- Compact Footprint: SOT-23-5 package saves board space in portable designs.
Battery-Powered Portable Devices
The LP2981AIBPX-3.3's low 125 µA quiescent current and 100mA output make it ideal for extending battery life in wearables, remote controls, and portable sensors.
Noise-Sensitive Analog Circuits
With 63dB PSRR at 1kHz, this LDO effectively filters power supply noise for precision op-amps, ADCs, and audio codecs requiring a clean 3.3V rail.
Microcontroller Power Supply
Stable 3.3V output with 100mA capacity suits low-power MCUs like MSP430 or STM32L0 series, ensuring reliable operation in IoT nodes.
Wireless Modules
Bluetooth Low Energy and Zigbee modules draw pulsed currents; the LP2981A's fast transient response maintains voltage stability during RF bursts.
Sensor Interface Boards
Provides regulated 3.3V for MEMS sensors, temperature probes, and pressure transducers, minimizing measurement errors from supply variation.
Space-Constrained Designs
The SOT-23-5 package occupies minimal PCB area, enabling compact designs for smart cards, dongles, and medical patches.
- Q: What is the output voltage of the LP2981AIBPX-3.3?
- A: The fixed output voltage is 3.3V.
- 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 range is not specified in the provided data; refer to the datasheet.
- Q: What is the dropout voltage?
- A: Dropout voltage is 0.375V at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 125 µA.
- Q: What package is available?
- A: It comes in a SOT-23-5 package.
LP2981AIBPX-3.3.pdf
- Q: What is the output voltage of the LP2981AIBPX-3.3?
- A: The fixed output voltage is 3.3V.
- 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 range is not specified in the provided data; refer to the datasheet.
- Q: What is the dropout voltage?
- A: Dropout voltage is 0.375V at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 125 µA.
- Q: What package is available?
- A: It comes in a SOT-23-5 package.
