Overview
The LM2931CTG, produced by onsemi, is a positive voltage regulator from the LM2931 series. This device is designed to provide adjustable output voltage and is particularly suited for harsh environments, such as those found in automotive applications. It features a very low input-to-output voltage differential, low bias current, and high output current capability, making it ideal for battery-powered industrial and consumer equipment where extended battery life is crucial.
Key Specifications
| Characteristic | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Output Voltage (Fixed) | VO | 4.75 | 5.0 | 5.25 | V |
| Output Voltage (Adjustable) | VO Range | 3.0 | - | 24 | V |
| Output Current | IO | - | - | 100 | mA |
| Input-Output Voltage Differential | - | - | - | < 0.6 | V @ 100 mA |
| Line Regulation | Regline | -2.0 | 10 | -2.0 | mV |
| Load Regulation | Regload | -14 | 50 | -14 | mV |
| Bias Current | IB | - | 0.4 | - | mA @ 10 mA output |
| Load Dump Protection | - | - | - | 60 V | - |
| Reverse Transient Protection | - | - | - | -50 V | - |
| Internal Current Limiting | - | - | - | - | - |
| Thermal Shutdown | - | - | - | - | - |
| Mirror-Image Protection | - | - | - | - | - |
Key Features
- Low Input-Output Voltage Differential: Less than 0.6 V at 100 mA output current, ensuring efficient voltage regulation.
- High Output Current Capability: Capable of supplying output currents in excess of 100 mA.
- Low Bias Current: 0.4 mA at 10 mA output, contributing to extended battery life in battery-powered devices.
- Load Dump Protection: Protects against 60 V load dump conditions and -50 V reverse transients.
- Internal Current Limiting and Thermal Shutdown: Provides protection against overcurrent and overheating conditions.
- Mirror-Image Protection: Withstands temporary power-up with mirror-image insertion.
- Output Inhibit Pin (for 'C' suffix adjustable output regulators): Useful in microprocessor-based systems for controlling the output.
Applications
- Automotive Systems: Designed to survive in harsh automotive environments, protecting against reverse battery connections, two battery jump starts, and excessive line transients.
- Battery-Powered Industrial and Consumer Equipment: Ideal for extending the useful life of batteries in various industrial and consumer devices.
- Memory Standby Circuits and Low Power Processor Power Supplies: Suitable for systems requiring low power consumption and high reliability.
- CMOS and Other Low Power Processor Power Supplies: Provides stable voltage regulation for sensitive electronic circuits.
Q & A
- What is the maximum output current of the LM2931CTG?
The LM2931CTG can supply output currents in excess of 100 mA.
- What is the input-output voltage differential of the LM2931CTG?
The input-output voltage differential is less than 0.6 V at 100 mA output current.
- Does the LM2931CTG have built-in protection features?
Yes, it includes load dump protection, reverse transient protection, internal current limiting, and thermal shutdown.
- What is the purpose of the output inhibit pin in the 'C' suffix adjustable output regulators?
The output inhibit pin is useful in microprocessor-based systems for controlling the output.
- Can the LM2931CTG withstand temporary mirror-image insertion?
Yes, it can withstand temporary power-up with mirror-image insertion.
- What are the typical applications of the LM2931CTG?
It is commonly used in automotive systems, battery-powered industrial and consumer equipment, memory standby circuits, and low power processor power supplies.
- What is the bias current of the LM2931CTG at 10 mA output?
The bias current is 0.4 mA at 10 mA output.
- What is the maximum operational input voltage for the LM2931CTG?
The maximum operational input voltage is 26 V.
- Does the LM2931CTG have short circuit protection?
Yes, it includes short circuit protection as part of its internal protection features.
- In what packages is the LM2931CTG available?
The LM2931CTG is available in TO-220, TO-92, TO-263, and SOIC-8 packages.
