Overview
The MC78M12ABDT is a 500 mA positive voltage regulator produced by onsemi. It is part of the MC78M00/MC78M00A Series, which are identical to the popular MC7800 Series devices but specified for half the output current. These three-terminal regulators are designed for local, on-card voltage regulation and are known for their ruggedness under most operating conditions.
The device is available in a TO-252-3, DPAK (2 Leads + Tab), SC-63 package and operates within a temperature range of -40°C to 125°C. It is suitable for various applications requiring stable and regulated voltage outputs.
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Output Voltage (TJ = 25°C) | 11.50 - 12.50 | Vdc |
| Output Voltage Variation (14.5 Vdc ≤ VI ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 350 mA) | 11.4 - 12.6 | Vdc |
| Maximum Output Current | 500 | mA |
| Peak Output Current (TJ = 25°C) | 700 | mA |
| Line Regulation (TJ = 25°C, 14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) | 8.0 - 50 | mV |
| Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) | 25 - 240 | mV |
| Input Bias Current (TJ = 25°C) | 3.2 - 6.0 | mA |
| Dropout Voltage (TJ = 25°C) | 2.0 | Vdc |
| Operating Temperature Range | -40°C to 125°C | |
| Package Type | TO-252-3, DPAK (2 Leads + Tab), SC-63 | |
| Protection Features | Over Temperature, Short Circuit |
Key Features
- No external components required for operation.
- Internal thermal overload protection and short circuit current limiting.
- Output transistor safe-area compensation.
- High accuracy (±2%) for the MC78M00A series.
- Available in fixed output voltages of 12V.
- NCV prefix available for automotive and other applications requiring high reliability.
- Low dropout voltage of 2.0 Vdc.
- High power supply rejection ratio (PSRR) of 80 dB at 120 Hz.
Applications
The MC78M12ABDT is suitable for a variety of applications that require stable and regulated voltage outputs. These include:
- Local, on-card voltage regulation in electronic devices.
- Automotive systems requiring high reliability (NCV prefix versions).
- Industrial control systems and equipment.
- Consumer electronics needing stable power supply.
- Medical devices and equipment.
Q & A
- What is the maximum output current of the MC78M12ABDT?
The maximum output current is 500 mA, with a peak output current of 700 mA at TJ = 25°C.
- What are the protection features of the MC78M12ABDT?
The device features internal thermal overload protection and short circuit current limiting.
- What is the operating temperature range of the MC78M12ABDT?
The operating temperature range is -40°C to 125°C.
- What is the dropout voltage of the MC78M12ABDT?
The dropout voltage is 2.0 Vdc at TJ = 25°C.
- Does the MC78M12ABDT require external components for operation?
No, the MC78M12ABDT does not require external components for operation.
- What is the power supply rejection ratio (PSRR) of the MC78M12ABDT?
The PSRR is 80 dB at 120 Hz.
- What are the available output voltages for the MC78M00/MC78M00A Series?
The available output voltages include 5.0 V, 8.0 V, 12 V, and 15 V.
- Is the MC78M12ABDT suitable for automotive applications?
- What is the typical quiescent current of the MC78M12ABDT?
The typical quiescent current is in the range of 3.2 to 6.0 mA.
- What is the line regulation of the MC78M12ABDT?
The line regulation is 8.0 to 50 mV at TJ = 25°C, with 14.5 Vdc ≤ VI ≤ 30 Vdc and IO = 200 mA.
