Overview
The LM2931AD-5.0 is a low dropout voltage regulator (LDO) produced by onsemi. This device is part of the LM2931 series, which includes positive fixed and adjustable output voltage regulators. The LM2931AD-5.0 is specifically designed to maintain proper regulation with an extremely low input-to-output voltage differential, making it ideal for applications requiring stable voltage output with minimal dropout voltage.
This regulator is particularly suited for harsh environments, such as automotive and battery-powered consumer products, due to its robust protection features against input fault conditions, including reverse battery connection, two-battery jump starts, and excessive line transients during load dump.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Continuous) | 40 | Vdc |
| Transient Input Voltage (≤ 100 ms) | 60 | Vpk |
| Output Voltage (Fixed) | 5.0 | V |
| Output Current | 100 | mA |
| Dropout Voltage @ 10 mA | 0.015 - 0.2 | V |
| Dropout Voltage @ 100 mA | 0.16 - 0.6 | V |
| Line Regulation | 30 mV | |
| Load Regulation | 50 mV | |
| Bias Current @ 10 mA | 0.4 mA | |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | SOIC-8 |
Key Features
- Low dropout voltage: Ensures minimal voltage loss between input and output.
- High accuracy: ±2.5% reference voltage for fixed output models.
- Internal current limiting and thermal shutdown: Protects the device from overcurrent and overheating conditions.
- Load dump protection: Withstands transient input voltages up to 60 V.
- Reverse transient protection: Up to -50 V.
- Temporary mirror-image protection: Survives temporary power-up with mirror-image insertion.
- Output inhibit pin: Useful in microprocessor-based systems for adjustable output models.
- Economical packaging: Available in TO-220, D2PAK, DPAK, and SOIC-8 packages.
- Pb-free packages available.
- AEC-Q100 qualified and PPAP capable for automotive applications.
Applications
- Battery-powered consumer products.
- Hand-held instruments.
- Camcorders and cameras.
- Automotive systems requiring robust voltage regulation.
- Industrial and consumer equipment where extended battery life is desirable.
Q & A
- What is the maximum input voltage for the LM2931AD-5.0?
The maximum continuous input voltage is 40 Vdc, with transient input voltage up to 60 Vpk for ≤ 100 ms.
- What is the output voltage of the LM2931AD-5.0?
The output voltage is fixed at 5.0 V.
- What is the maximum output current of the LM2931AD-5.0?
The maximum output current is 100 mA.
- What are the key protection features of the LM2931AD-5.0?
The device features internal current limiting, thermal shutdown, load dump protection up to 60 V, and reverse transient protection up to -50 V.
- What are the operating temperature ranges for the LM2931AD-5.0?
The operating temperature range is from -40°C to 125°C.
- What packages are available for the LM2931AD-5.0?
The device is available in TO-220, D2PAK, DPAK, and SOIC-8 packages.
- Is the LM2931AD-5.0 suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive applications.
- What is the dropout voltage of the LM2931AD-5.0 at 10 mA and 100 mA output currents?
The dropout voltage is 0.015 - 0.2 V at 10 mA and 0.16 - 0.6 V at 100 mA.
- Does the LM2931AD-5.0 have an output inhibit feature?
Yes, the adjustable output models feature an output inhibit pin, which is useful in microprocessor-based systems.
- What is the ripple rejection of the LM2931AD-5.0?
The ripple rejection is 0.10 %/V at 120 Hz.
