Overview
The LP2981IM5-5.0/NOPB, produced by Texas Instruments (formerly National Semiconductor), is a fixed-output, low-dropout (LDO) voltage regulator. This device is designed to meet the requirements of battery-powered applications and other low-voltage systems. It offers high accuracy and stability, making it suitable for a variety of electronic systems, including those requiring precise voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Accuracy | ±0.75% (A Grade), ±1.25% (Standard Grade) | % |
| Case/Package | SOT-23 | |
| Current Rating | 100 mA | mA |
| Dropout Voltage | 200 mV (typical at 100 mA load) | mV |
| Lead Free | Lead Free | |
| Max Input Voltage | 16 V | V |
| Min Input Voltage | 2.1 V (Legacy), 2.5 V (New Chip) | V |
| Max Operating Temperature | 125°C | °C |
| Min Operating Temperature | -40°C | °C |
| Max Output Current | 100 mA | mA |
| Max Supply Current | 1.7 mA | mA |
| Quiescent Current | 95 µA (typical) | µA |
| Power Supply Rejection Ratio (PSRR) | 75 dB at 1 kHz, 45 dB at 1 MHz | dB |
| Output Voltage | 5 V | V |
| Output Configuration | Positive | |
| Number of Outputs | 1 | |
| Number of Pins | 5 | |
| Packaging | Tape and Reel |
Key Features
- High Accuracy Output Voltage: The LP2981IM5-5.0/NOPB offers high output voltage accuracy with ±0.75% for A-Grade and ±1.25% for standard-grade legacy chips, and ±0.5% for new chips.
- Low Dropout Voltage: Typical dropout voltage of 200 mV at 100 mA load current and as low as 7 mV at 1 mA load current.
- Low Quiescent Current: Quiescent current is typically 95 µA, and less than 1 µA in shutdown mode.
- Overcurrent and Overtemperature Protection: The device includes internal current-limit and thermal shutdown protection to safeguard against high-load current faults and excessive heat.
- High PSRR: High power supply rejection ratio (PSRR) of 75 dB at 1 kHz and 45 dB at 1 MHz to minimize post-regulator filtering.
- Sleep Mode: A sleep mode feature allows the regulator to consume only 1 µA when the ON/OFF pin is pulled low, enhancing battery life in battery-powered applications.
Applications
- Battery-Powered Devices: Ideal for battery-powered applications due to its low dropout voltage, high accuracy, and low quiescent current.
- Microcontrollers and Processors: Suitable for low-voltage microcontrollers and processors requiring precise voltage regulation.
- Electricity Meters and Micro Inverters: Used in various industrial and consumer electronics such as electricity meters and micro inverters.
- Server Power Supplies: Can be used in server power supplies, particularly for 12-V output configurations).
- Residential Breakers: Applicable in residential breaker systems due to its reliability and protection features).
Q & A
- What is the maximum output current of the LP2981IM5-5.0/NOPB?
The maximum output current is up to 100 mA).
- What is the typical dropout voltage of the LP2981IM5-5.0/NOPB?
The typical dropout voltage is 200 mV at a 100 mA load current).
- What is the operating temperature range of the LP2981IM5-5.0/NOPB?
The operating temperature range is from -40°C to 125°C).
- Does the LP2981IM5-5.0/NOPB have overcurrent protection?
Yes, it includes internal current-limit and thermal shutdown protection).
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is less than 1 µA).
- What is the power supply rejection ratio (PSRR) of the LP2981IM5-5.0/NOPB?
The PSRR is 75 dB at 1 kHz and 45 dB at 1 MHz).
- What is the output voltage accuracy of the LP2981IM5-5.0/NOPB?
The output voltage accuracy is ±0.75% for A-Grade and ±1.25% for standard-grade legacy chips, and ±0.5% for new chips).
- Is the LP2981IM5-5.0/NOPB lead-free?
Yes, the LP2981IM5-5.0/NOPB is lead-free).
- What is the package type of the LP2981IM5-5.0/NOPB?
The package type is 5-pin SOT-23 (DBV)).
- What are some common applications of the LP2981IM5-5.0/NOPB?
Common applications include battery-powered devices, microcontrollers, electricity meters, micro inverters, and server power supplies).
