Overview
The MC78M12ABDTG is a 500 mA positive linear voltage regulator produced by onsemi. It is part of the MC78M00/MC78M00A series, which is similar to the popular MC7800 Series but specified for half the output current. This three-terminal regulator is designed for local, on-card voltage regulation and is known for its ruggedness under various operating conditions.
The device features internal current limiting, thermal shutdown circuitry, and safe-area compensation for the internal pass transistor, ensuring reliable operation. It is available in Pb-free packages and offers high accuracy options for specific voltage outputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (TJ = 25°C) | 11.76 - 12.24 | Vdc |
| Output Current (Typical) | 500 | mA |
| Peak Output Current (TJ = 25°C) | 700 | mA |
| Input Voltage Range | 7 - 35 | V |
| Operating Temperature Range | -40°C to +125°C | °C |
| Package Type | DPAK-3 | |
| Line Regulation | 10 - 50 | mV |
| Load Regulation | 30 - 480 | mV |
| PSRR (Power Supply Rejection Ratio) | 70 | dB |
| Noise (rms) | 40 | µV |
Key Features
- No external components required for operation.
- Internal thermal overload protection and short circuit current limiting.
- Output transistor safe-area compensation.
- High accuracy options available (±2% for specific voltage outputs).
- Pb-free packages available.
- High PSRR (Power Supply Rejection Ratio) for better noise rejection.
Applications
The MC78M12ABDTG is suitable for various industrial and commercial applications requiring reliable local voltage regulation. These include:
- On-card voltage regulation in electronic devices.
- Power supplies for industrial control systems.
- Voltage regulation in automotive and aerospace systems.
- Medical devices requiring stable voltage supply.
Q & A
- What is the maximum output current of the MC78M12ABDTG?
The maximum output current is 500 mA with adequate heatsinking.
- What are the available package types for the MC78M12ABDTG?
The device is available in DPAK-3 and TO-220 packages.
- What is the operating temperature range of the MC78M12ABDTG?
The operating temperature range is -40°C to +125°C.
- Does the MC78M12ABDTG require external components for operation?
No, the MC78M12ABDTG does not require external components for operation.
- What is the PSRR of the MC78M12ABDTG?
The PSRR is 70 dB.
- Is the MC78M12ABDTG available in Pb-free packages?
- What is the typical noise level of the MC78M12ABDTG?
The typical noise level is 40 µV rms.
- What are the key protection features of the MC78M12ABDTG?
The device features internal thermal overload protection and short circuit current limiting.
- What is the line regulation of the MC78M12ABDTG?
The line regulation is 10 - 50 mV.
- What is the load regulation of the MC78M12ABDTG?
The load regulation is 30 - 480 mV.
