Overview
The LP2981AIM5X-5.0, produced by Texas Instruments (originally National Semiconductor), is a fixed-output, low-dropout (LDO) voltage regulator. This component is designed to operate within an input voltage range of 2.5 V to 16 V for the new chip, and it can supply up to 100 mA of load current. The output voltage range is from 1.2 V to 5.0 V, making it suitable for various low-voltage applications such as microcontrollers and processors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 V to 16 V (new chip) | V |
| Output Voltage Range | 1.2 V to 5.0 V | V |
| Output Voltage Accuracy | ±0.5% (new chip), ±0.75% (A-Grade legacy), ±1.25% (standard-grade legacy) | % |
| Output Current | Up to 100 mA | mA |
| Quiescent Current (IQ) | 69 µA at ILOAD = 0 mA, 620 µA at ILOAD = 100 mA (new chip) | µA |
| Shutdown Current | < 1 µA (legacy chip), ≤ 1.75 µA (new chip) | µA |
| Operating Junction Temperature | -40°C to +125°C | °C |
| Package | 5-pin SOT-23 (DBV) | - |
| PSRR (Power Supply Rejection Ratio) | 75 dB at 1 kHz, 45 dB at 1 MHz (new chip) | dB |
Key Features
- Low dropout voltage regulator with high accuracy output voltage.
- Wide input voltage range from 2.5 V to 16 V for the new chip.
- Output voltage range from 1.2 V to 5.0 V.
- High PSRR performance: 75 dB at 1 kHz and 45 dB at 1 MHz.
- Low quiescent current: 69 µA at no load and 620 µA at full load.
- Shutdown current less than 1.75 µA.
- Internal soft-start, current limiting, and thermal protection.
- Stable operation with 2.2-µF ceramic capacitors.
Applications
- Electricity meters
- Micro inverters
- Server power supplies (e.g., 12-V output)
- Residential breakers
- Low-voltage microcontrollers (MCUs) and processors
Q & A
- What is the input voltage range for the LP2981AIM5X-5.0?
The input voltage range is from 2.5 V to 16 V for the new chip.
- What is the output voltage range of the LP2981AIM5X-5.0?
The output voltage range is from 1.2 V to 5.0 V.
- What is the maximum output current of the LP2981AIM5X-5.0?
The maximum output current is up to 100 mA.
- What is the quiescent current (IQ) of the LP2981AIM5X-5.0?
The quiescent current is 69 µA at no load and 620 µA at full load for the new chip.
- What is the shutdown current of the LP2981AIM5X-5.0?
The shutdown current is less than 1 µA for legacy chips and less than or equal to 1.75 µA for new chips.
- What is the operating junction temperature range of the LP2981AIM5X-5.0?
The operating junction temperature range is -40°C to +125°C.
- What package type is the LP2981AIM5X-5.0 available in?
The LP2981AIM5X-5.0 is available in a 5-pin SOT-23 (DBV) package.
- What are the key protection features of the LP2981AIM5X-5.0?
The key protection features include internal soft-start, current limiting, and thermal protection.
- What is the PSRR performance of the LP2981AIM5X-5.0?
The PSRR performance is 75 dB at 1 kHz and 45 dB at 1 MHz for the new chip.
- What types of applications is the LP2981AIM5X-5.0 suitable for?
The LP2981AIM5X-5.0 is suitable for applications such as electricity meters, micro inverters, server power supplies, residential breakers, and low-voltage microcontrollers (MCUs) and processors.
