Overview
The MC78M12BDTRK is a 500 mA positive voltage regulator from ON Semiconductor, part of the MC78M00/MC78M00A series. These regulators are designed for local, on-card voltage regulation and are identical to the popular MC7800 series devices but specified for half the output current. They are known for their ruggedness under most operating conditions, thanks to internal current limiting, thermal shutdown circuitry, and safe-area compensation for the internal pass transistor.
Key Specifications
| Characteristics | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 11.50 | 11.76 | 12.00 | Vdc |
| Output Voltage Variation (14.5 Vdc ≤ VI ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 350 mA) | VO | 11.4 | - | 12.6 | Vdc |
| Line Regulation (TJ = 25°C, 14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) | Regline | - | 8.0 | 50 | mV |
| Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) | Regload | - | - | 25 | mV |
| Input Bias Current (TJ = 25°C) | IIB | - | 3.2 | 6.0 | mA |
| Dropout Voltage (TJ = 25°C) | VI−VO | - | 2.0 | - | Vdc |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | IOS | - | 350 | - | mA |
| Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) | ΔVO/ΔT | - | ±0.2 | - | mV/°C |
| Peak Output Current (TJ = 25°C) | IO | - | 700 | - | mA |
Key Features
- No External Components Required
- Internal Thermal Overload Protection
- Internal Short Circuit Current Limiting
- Output Transistor Safe-Area Compensation
- High Accuracy (±2%) for MC78M00A Series
- AEC-Q100 Qualified and PPAP Capable for Automotive and Other Applications (NCV Prefix)
Applications
The MC78M12BDTRK is suitable for various applications requiring local, on-card voltage regulation. These include:
- Industrial Control Systems
- Automotive Systems (with NCV prefix)
- Consumer Electronics
- Medical Devices
- Telecommunication Equipment
Q & A
- What is the maximum output current of the MC78M12BDTRK?
The maximum output current is 500 mA with adequate heatsinking.
- What is the output voltage range for the MC78M12BDTRK?
The output voltage range is 11.50 V to 12.00 V at TJ = 25°C.
- What is the dropout voltage for the MC78M12BDTRK?
The dropout voltage is 2.0 Vdc at TJ = 25°C.
- Does the MC78M12BDTRK have internal thermal protection?
- Is the MC78M12BDTRK suitable for automotive applications?
- What is the temperature range for the MC78M12BDTRK?
The temperature range is -40°C to +125°C.
- Does the MC78M12BDTRK require external components for operation?
No, it does not require external components for operation.
- What is the short circuit current limit for the MC78M12BDTRK?
The short circuit current limit is 350 mA at TJ = 25°C and VI = 35 V.
- What is the average temperature coefficient of output voltage for the MC78M12BDTRK?
The average temperature coefficient of output voltage is ±0.2 mV/°C at IO = 5.0 mA.
- What is the peak output current for the MC78M12BDTRK?
The peak output current is 700 mA at TJ = 25°C.
