Overview
The LM2931ACDR2G is a positive fixed and adjustable output low dropout (LDO) linear voltage regulator produced by onsemi. This device is designed to maintain proper regulation with an extremely low input-to-output voltage differential, making it ideal for applications requiring high efficiency and reliability. The LM2931 series is capable of supplying output currents in excess of 100 mA and features a low bias current of 0.4 mA at 10 mA output. Originally designed for the harsh automotive environment, it protects against reverse battery connections, two-battery jump starts, and excessive line transients during load dump. It also includes internal current limiting, thermal shutdown, and temporary mirror-image protection.
Key Specifications
| Parameter | Conditions | Typical | Minimum | Maximum | Units |
|---|---|---|---|---|---|
| Input Voltage Continuous | - | - | - | 40 | Vdc |
| Transient Input Voltage (≤ 100 ms) | - | - | - | 60 | Vpk |
| Output Current | - | - | - | 100 | mA |
| Dropout Voltage @ 100 mA | - | 0.16 | - | 0.6 | V |
| Load Dump Protection | - | - | - | 60 | V |
| Reverse Transient Protection | - | - | - | -50 | V |
| Quiescent Current @ 10 mA Output | - | 0.4 | - | 1.0 | mA |
| Output Noise Voltage (10 Hz - 100 kHz) | - | 140 | - | - | μVrms |
| Package Type | - | - | - | SOIC-8 | - |
Key Features
- Input-to-Output Voltage Differential of less than 0.6 V @ 100 mA
- Output Current in excess of 100 mA
- Low Bias Current of 0.4 mA at 10 mA output
- 60 V Load Dump Protection and -50 V Reverse Transient Protection
- Internal Current Limiting with Thermal Shutdown
- Temporary Mirror-Image Protection
- Output Inhibit Pin (for 'C' suffix adjustable output regulators)
- High Accuracy (+/-2%) Reference (for certain versions)
- Economical 5-Lead TO-220 Package and various surface mount packages (SOP-8, DPAK, etc.)
Applications
- Battery Powered Consumer Products
- Handheld Instruments
- Automotive Systems
- Memory Standby Circuits
- CMOS and Low Power Processor Power Supplies
- Battery Powered Industrial and Consumer Equipment
Q & A
- What is the maximum output current of the LM2931ACDR2G?
The LM2931ACDR2G can supply output currents in excess of 100 mA.
- What is the dropout voltage at 100 mA output current?
The dropout voltage at 100 mA output current is typically 0.16 V, with a maximum of 0.6 V.
- Does the LM2931ACDR2G have protection against reverse battery connections?
- What is the quiescent current at 10 mA output?
The quiescent current at 10 mA output is typically 0.4 mA, with a maximum of 1.0 mA.
- What types of packages are available for the LM2931ACDR2G?
The LM2931ACDR2G is available in SOIC-8, TO-220, TO-92, TO-263, and DPAK packages.
- Does the LM2931ACDR2G have thermal shutdown protection?
- What is the maximum input voltage for the LM2931ACDR2G?
The maximum continuous input voltage is 40 Vdc, with transient input voltage protection up to 60 Vpk.
- Is the LM2931ACDR2G suitable for automotive applications?
- Does the LM2931ACDR2G have an output inhibit pin?
- What is the typical output noise voltage of the LM2931ACDR2G?
The typical output noise voltage is 140 μVrms over the frequency range of 10 Hz to 100 kHz.
