Overview
The MC78M12BDT is a 500 mA positive voltage regulator from onsemi, 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. The MC78M12BDT is particularly suited for applications requiring a stable 12V output voltage.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 11.50 | 12 | 12.50 | 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 | - | - | 240 | mV |
| Peak Output Current (TJ = 25°C) | IO | - | - | 700 | mA |
| Input Bias Current (TJ = 25°C) | IIB | - | - | 6.0 | mA |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | IOS | - | - | 350 | mA |
| Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) | VO/VT | - | - | ±0.2 | mV/°C |
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 Requiring Unique Site and Control Change Requirements (NCV Prefix)
Applications
The MC78M12BDT is suitable for a variety of applications requiring stable voltage regulation, including:
- Local, on-card voltage regulation in electronic devices
- Automotive systems (with NCV prefix for AEC-Q100 qualification)
- Industrial control systems
- Consumer electronics
- Telecommunication equipment
Q & A
- What is the maximum output current of the MC78M12BDT?
The maximum output current, with adequate heatsinking, is 500 mA.
- What is the typical output voltage of the MC78M12BDT?
The typical output voltage is 12 V.
- Does the MC78M12BDT require external components for operation?
No, the MC78M12BDT does not require external components for operation.
- What kind of protection does the MC78M12BDT have?
The MC78M12BDT has internal thermal overload protection and internal short circuit current limiting.
- Is the MC78M12BDT suitable for automotive applications?
Yes, with the NCV prefix, it is AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements.
- What is the line regulation of the MC78M12BDT?
The line regulation is typically 8.0 mV (14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA).
- What is the load regulation of the MC78M12BDT?
The load regulation is typically 240 mV (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA).
- What is the peak output current of the MC78M12BDT?
The peak output current is 700 mA (TJ = 25°C).
- What is the average temperature coefficient of output voltage?
The average temperature coefficient of output voltage is ±0.2 mV/°C (IO = 5.0 mA).
- What is the short circuit current limit of the MC78M12BDT?
The short circuit current limit is 350 mA (TJ = 25°C, VI = 35 V).
