Overview
The MC78M09BDT is a 500 mA positive voltage regulator produced by Onsemi. It is part of the MC78M00 series, which is similar to the popular MC7800 series but specified for half the output current. This regulator is designed for local, on-card voltage regulation and is known for its robustness and reliability under various operating conditions.
The device features internal current limiting, thermal shutdown circuitry, and safe-area compensation for the internal pass transistor, making it remarkably rugged. It is available in several voltage options, including 9V for the MC78M09BDT model.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 8.64 | 9.0 | 9.45 | Vdc |
| Output Voltage Variation (11.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA) | VO | 8.55 | - | 9.45 | Vdc |
| Line Regulation (TJ = 25°C, 11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) | Regline | - | 6.0 | 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 |
| 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 Temperature | - | -40°C | - | 125°C | - |
| Mounting Style | - | - | - | Surface Mount | - |
Key Features
- No External Components Required: The MC78M09BDT does not need external components to function, simplifying the design process.
- Internal Thermal Overload Protection: This feature protects the device from overheating, ensuring reliability and longevity.
- Internal Short Circuit Current Limiting: The regulator has built-in current limiting to prevent damage from short circuits.
- Output Transistor Safe-Area Compensation: This ensures the internal pass transistor operates within safe limits.
- High Accuracy: The MC78M00A series, which includes the MC78M09BDT, offers high accuracy with ±2% tolerance.
- AEC-Q100 Qualified: The NCV prefix versions are qualified for automotive and other applications requiring unique site and control change requirements.
Applications
The MC78M09BDT is suitable for a variety of applications requiring local, on-card voltage regulation. These include:
- Automotive Systems: Especially for applications requiring AEC-Q100 qualification.
- Industrial Control Systems: Where robust and reliable voltage regulation is crucial.
- Consumer Electronics: For devices needing stable and efficient power supply.
- Medical Devices: Where precision and reliability in voltage regulation are essential.
Q & A
- What is the output voltage of the MC78M09BDT?
The output voltage of the MC78M09BDT is between 8.64V and 9.45V at 25°C.
- What is the maximum output current of the MC78M09BDT?
The maximum output current is 500 mA, with a peak output current of 700 mA at 25°C.
- What are the operating temperature ranges for the MC78M09BDT?
The operating temperature range is from -40°C to 125°C.
- Does the MC78M09BDT require external components?
No, the MC78M09BDT does not require external components to function.
- What kind of protection does the MC78M09BDT have?
The device has internal thermal overload protection and short circuit current limiting.
- Is the MC78M09BDT suitable for automotive applications?
Yes, the NCV prefix versions are AEC-Q100 qualified, making them suitable for automotive and other demanding applications.
- What is the mounting style of the MC78M09BDT?
The MC78M09BDT is a surface mount device.
- What is the line regulation of the MC78M09BDT?
The line regulation is 6.0 mV (typical) over the input voltage range of 11.5 Vdc to 25 Vdc at an output current of 200 mA.
- What is the load regulation of the MC78M09BDT?
The load regulation is 25 mV (maximum) over the output current range of 5.0 mA to 500 mA.
- What is the average temperature coefficient of output voltage for the MC78M09BDT?
The average temperature coefficient of output voltage is ±0.2 mV/°C at an output current of 5.0 mA.
