Overview
The LP2981AIM5-5.0 is a fixed-output, low-dropout (LDO) voltage regulator produced by Texas Instruments. This component is part of the LP2981-N series and is designed to provide a stable output voltage with high accuracy and low dropout voltage. It supports an input voltage range from 2.5 V to 16 V and can deliver up to 100 mA of load current, making it suitable for a variety of applications, including low-voltage microcontrollers (MCUs) and processors.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.5 V to 16 V (new chip) |
| Output Voltage Range | 1.2 V to 5.0 V |
| Output Voltage Accuracy | ±0.5% (new chip), ±1% over load and temperature |
| Output Current | Up to 100 mA |
| Quiescent Current (IQ) | 69 µA at ILOAD = 0 mA, 620 µA at ILOAD = 100 mA |
| Shutdown Current | ≤ 1.75 µA (new chip) |
| Operating Junction Temperature | –40°C to +125°C |
| Package | 5-pin SOT-23 (DBV) |
| PSRR | 75 dB at 1 kHz, 45 dB at 1 MHz |
Key Features
- High output voltage accuracy: ±0.5% for new chip, ±1% over load and temperature.
- Low dropout voltage and high PSRR: 75 dB at 1 kHz, 45 dB at 1 MHz.
- Low quiescent current: 69 µA at no load and 620 µA at full load.
- Internal soft-start and current-limit protection to reduce inrush current.
- Overcurrent and overtemperature protection.
- Stable operation with 2.2-µF ceramic capacitors.
- Shutdown current less than 1.75 µA.
Applications
The LP2981AIM5-5.0 is suitable for various applications requiring stable and low-noise voltage regulation, including:
- Low-voltage microcontrollers (MCUs) and processors.
- Portable electronics and battery-powered devices.
- Industrial control systems and automation.
- Medical devices and equipment.
- Consumer electronics requiring low dropout voltage and high PSRR.
Q & A
- What is the input voltage range of the LP2981AIM5-5.0?
The input voltage range is from 2.5 V to 16 V for the new chip.
- What is the maximum output current of the LP2981AIM5-5.0?
The maximum output current is up to 100 mA.
- What is the output voltage accuracy of the LP2981AIM5-5.0?
The output voltage accuracy is ±0.5% for the new chip and ±1% over load and temperature.
- What is the quiescent current (IQ) of the LP2981AIM5-5.0?
The quiescent current is 69 µA at no load and 620 µA at full load.
- What is the shutdown current of the LP2981AIM5-5.0?
The shutdown current is less than or equal to 1.75 µA.
- What is the operating junction temperature range of the LP2981AIM5-5.0?
The operating junction temperature range is from –40°C to +125°C.
- What package type is the LP2981AIM5-5.0 available in?
The LP2981AIM5-5.0 is available in a 5-pin SOT-23 (DBV) package.
- What are the key protection features of the LP2981AIM5-5.0?
The key protection features include overcurrent protection, overtemperature protection, and internal soft-start and current-limit protection.
- What is the PSRR of the LP2981AIM5-5.0?
The PSRR is 75 dB at 1 kHz and 45 dB at 1 MHz.
- Is the LP2981AIM5-5.0 stable with ceramic capacitors?
Yes, the LP2981AIM5-5.0 is stable with 2.2-µF ceramic capacitors.
