Overview
The MC78M09CDT is a 500 mA positive voltage regulator from onsemi, part of the MC78M00/MC78M00A Series. These regulators are similar to the popular MC7800 Series but are specified for half the output current. They are designed for local, on-card voltage regulation and are known for their robustness and reliability under various operating conditions.
The MC78M09CDT is specifically configured to provide an output voltage of 9.0 V, making it suitable for a wide range of applications requiring stable and regulated voltage supply.
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 | - | - | 30 | mV |
| 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 |
| Dropout Voltage (TJ = 25°C) | VI-VO | - | 2.0 | - | Vdc |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | IOS | - | 350 | - | mA |
Key Features
- No External Components Required: The MC78M09CDT does not need external components to operate, 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 output transistor operates within safe limits, enhancing device reliability.
- High Accuracy: The MC78M00A version offers high accuracy with an output voltage tolerance of ±2%.
- AEC-Q100 Qualified: The NCV prefix versions are qualified for automotive and other applications requiring unique site and control change requirements.
Applications
- Local, On-Card Voltage Regulation: Ideal for providing stable voltage supply within a circuit board.
- Automotive Systems: NCV prefixed versions are suitable for automotive applications due to their AEC-Q100 qualification.
- Industrial Control Systems: Used in various industrial control systems where stable voltage is crucial.
- Consumer Electronics: Found in consumer electronics requiring regulated power supply.
- Medical Devices: Used in medical devices where precise voltage regulation is necessary.
Q & A
- What is the output voltage of the MC78M09CDT?
The output voltage of the MC78M09CDT is 9.0 V, with a tolerance range of 8.64 V to 9.45 V at 25°C.
- What is the maximum output current of the MC78M09CDT?
The maximum output current is 500 mA, with a peak output current of up to 700 mA at 25°C.
- Does the MC78M09CDT require external components to operate?
No, the MC78M09CDT does not require external components to operate, making it a simple and efficient solution for voltage regulation.
- What protection features does the MC78M09CDT have?
The MC78M09CDT has internal thermal overload protection and internal short circuit current limiting, ensuring the device's reliability and longevity.
- Is the MC78M09CDT suitable for automotive applications?
Yes, the NCV prefixed versions of the MC78M00 series, including the MC78M09CDT, are AEC-Q100 qualified and suitable for automotive applications.
- What is the dropout voltage of the MC78M09CDT?
The dropout voltage of the MC78M09CDT is 2.0 V at 25°C.
- How does the MC78M09CDT handle temperature variations?
The MC78M09CDT has an average temperature coefficient of output voltage of ±0.2 mV/°C, ensuring stable output voltage across different temperatures.
- What is the line regulation of the MC78M09CDT?
The line regulation of the MC78M09CDT is 6.0 mV (typical) with a maximum of 50 mV over the specified input voltage range.
- What is the load regulation of the MC78M09CDT?
The load regulation of the MC78M09CDT is 30 mV (maximum) over the specified output current range.
- Is the MC78M09CDT still in production?
No, the MC78M09CDT is no longer manufactured, but substitutes are available.
