Overview
The LM2931AD50, produced by STMicroelectronics, is a very low drop voltage regulator designed for low noise, low power applications and battery-powered systems. This regulator is particularly suited for automotive and industrial environments due to its robust protection features and low quiescent current. The LM2931AD50 is available in various packages, including SO-8, DPAK, and TO-92, and offers fixed output voltages of 3.3 V and 5 V. The device includes a shutdown logic control function, making it ideal for local regulation and power management in microprocessor-based systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Continuous) | 26 | V |
| Transient Input Voltage | 60 | Vpk (≤ 100 ms) |
| Output Voltage (Nominal) | 5 | V |
| Output Current (Nominal) | 100 | mA |
| Dropout Voltage (Typical at 10 mA load) | 90 | mV |
| Quiescent Current (Typical at 100 mA load) | 2.5 | mA |
| Operating Temperature Range | -40 to 125 | °C |
| Load Dump Protection | Up to 60 V | |
| Reverse Transient Protection | Up to -50 V | |
| Internal Current Limiting and Thermal Shutdown | Yes | |
| Package Options | SO-8, DPAK, TO-92 |
Key Features
- Very Low Dropout Voltage: Typical 90 mV at 10 mA load.
- Low Quiescent Current: Typical 2.5 mA at 100 mA load.
- High Output Current: Up to 100 mA.
- Fixed Output Voltages: Available in 3.3 V and 5 V versions.
- Internal Current and Thermal Limiting: Protects against overcurrent and overheating.
- Load Dump Protection: Up to 60 V and reverse transient protection up to -50 V.
- Shutdown Logic Control: Available in SO-8 package for power management.
- AEC-Q100 Qualified: For DPAK package, ensuring automotive-grade reliability.
Applications
The LM2931AD50 is ideal for various applications, including:
- Automotive Systems: Due to its robust protection against load dumps, reverse battery connections, and high transient voltages.
- Battery-Powered Devices: Extends battery life with low quiescent current and low dropout voltage.
- Industrial Equipment: Suitable for low noise, low power applications in industrial settings.
- Microprocessor-Based Systems: The output inhibit pin is useful for managing power in microprocessor-based systems.
Q & A
- What is the typical dropout voltage of the LM2931AD50 at a 10 mA load?
The typical dropout voltage is 90 mV at a 10 mA load.
- What is the maximum output current of the LM2931AD50?
The maximum output current is up to 100 mA.
- What are the available output voltage options for the LM2931AD50?
The LM2931AD50 is available in fixed output voltages of 3.3 V and 5 V.
- Does the LM2931AD50 have internal current limiting and thermal shutdown features?
Yes, it includes internal current limiting and thermal shutdown features for protection.
- What is the operating temperature range of the LM2931AD50?
The operating temperature range is from -40°C to 125°C.
- Is the LM2931AD50 protected against load dump and reverse transient voltages?
Yes, it is protected up to 60 V load dump and -50 V reverse transient voltages.
- What packages are available for the LM2931AD50?
The LM2931AD50 is available in SO-8, DPAK, and TO-92 packages.
- Is the LM2931AD50 AEC-Q100 qualified?
Yes, the DPAK package is AEC-Q100 qualified).
- What is the quiescent current of the LM2931AD50 at a 100 mA load?
The typical quiescent current is 2.5 mA at a 100 mA load).
- Can the LM2931AD50 be used in microprocessor-based systems?
Yes, the output inhibit pin makes it useful for managing power in microprocessor-based systems).
