Overview
The LM2931D-R, produced by STMicroelectronics, is a very low drop voltage regulator designed for applications requiring high reliability and robustness. This regulator is particularly suited for automotive and battery-powered systems due to its low dropout voltage and low quiescent current. The LM2931D-R features an inhibit function, which allows for shutdown logic control, enabling parts of the board to be put into standby mode to reduce total power consumption.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Maximum Operating Input Voltage | - | - | 26 | V |
| Output Voltage (3.3V Version) | 3.175 | 3.3 | 3.425 | V |
| Output Voltage (5V Version) | 4.81 | 5 | 5.19 | V |
| Output Current | - | - | 100 mA | mA |
| Dropout Voltage (IO = 10 mA) | - | 90 mV | 200 mV | mV |
| Quiescent Current (ON Mode, IO = 100 mA) | - | 2.5 mA | 30 mA | mA |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Transient Input Voltage (t < 100 ms) | - | - | 60 V | V |
| Reverse Polarity Input Voltage Transient (t < 100 ms) | -50 V | - | -50 V | V |
Key Features
- Very Low Dropout Voltage: Typically 90 mV at 10 mA load, making it suitable for low noise and low power applications.
- Low Quiescent Current: Typically 2.5 mA at 100 mA load, which helps in extending battery life in battery-powered systems.
- Internal Current and Thermal Limiting: Protects the device from overcurrent and overheating conditions.
- Load Dump Protection: Can withstand transient input voltages up to 60 V and reverse polarity input voltage transients up to -50 V.
- Inhibit Function: Allows for shutdown logic control, enabling parts of the board to be put into standby mode.
- AEC-Q100 Qualified (DPAK only): Ensures the device meets automotive quality standards.
- Multiple Package Options: Available in TO-92, DPAK, and SO-8 packages.
Applications
- Automotive Systems: Ideal for use in harsh automotive environments due to its robust protection features against reverse battery connections, two battery jump starts, and load dump conditions.
- Battery-Powered Equipment: Suitable for industrial and consumer battery-powered devices where extending battery life is crucial.
- Low Noise and Low Power Systems: Appropriate for applications requiring minimal noise and power consumption.
Q & A
- What is the typical dropout voltage of the LM2931D-R?
The typical dropout voltage of the LM2931D-R is 90 mV at a 10 mA load.
- What is the maximum output current of the LM2931D-R?
The maximum output current of the LM2931D-R is 100 mA.
- What are the available output voltage options for the LM2931D-R?
The LM2931D-R is available with fixed output voltages of 3.3 V and 5 V.
- Does the LM2931D-R have an inhibit function?
- What is the operating junction temperature range of the LM2931D-R?
The operating junction temperature range of the LM2931D-R is -40°C to 125°C.
- Is the LM2931D-R AEC-Q100 qualified?
- What kind of protection does the LM2931D-R offer against transient input voltages?
The LM2931D-R can withstand transient input voltages up to 60 V and reverse polarity input voltage transients up to -50 V.
- What are the available package options for the LM2931D-R?
The LM2931D-R is available in TO-92, DPAK, and SO-8 packages.
- What is the typical quiescent current of the LM2931D-R in ON mode?
The typical quiescent current of the LM2931D-R in ON mode is 2.5 mA at a 100 mA load.
- Does the LM2931D-R have internal current and thermal limiting features?
