Overview
The MC78M12CT 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 similar to the MC7800 Series but with half the output current. They are known for their robustness and reliability under various operating conditions, featuring 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 | 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 | - | - | 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 | |
| Operating Junction Temperature Range | TJ | - | - | +150 | °C |
| Storage Temperature Range | Tstg | -65 | - | +150 | °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 models
- Pb-Free Packages Available
Applications
The MC78M12CT is suitable for various applications requiring local, on-card voltage regulation. These include:
- Embedded systems and microcontrollers
- Industrial control systems
- Automotive electronics (with NCV prefix models)
- Consumer electronics
- Telecommunication equipment
Q & A
- What is the maximum output current of the MC78M12CT?
The maximum output current of the MC78M12CT is 500 mA with adequate heatsinking.
- What are the key features of the MC78M12CT?
The key features include no external components required, internal thermal overload protection, internal short circuit current limiting, and output transistor safe-area compensation.
- What is the operating junction temperature range for the MC78M12CT?
The operating junction temperature range is from 0°C to +125°C.
- What is the storage temperature range for the MC78M12CT?
The storage temperature range is from -65°C to +150°C.
- What is the dropout voltage for the MC78M12CT?
The dropout voltage is 2.0 Vdc at TJ = 25°C.
- What is the short circuit current limit for the MC78M12CT?
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 MC78M12CT?
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 MC78M12CT?
The peak output current is 700 mA at TJ = 25°C.
- Are Pb-Free packages available for the MC78M12CT?
- What are some common applications for the MC78M12CT?
