Overview
The MC78M12CDTG is a 500 mA positive voltage regulator from onsemi, part of the MC78M00/MC78M00A and NCV78M00 series. These three-terminal regulators are designed for local, on-card voltage regulation and are known for their ruggedness and reliability under various operating conditions. The MC78M12CDTG is specifically configured to provide a stable output voltage of 12 V.
Key Specifications
| Characteristics | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 11.50 | 12.00 | 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 | - | - | 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 |
| Quiescent Current Change (14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) | ΔIIB | - | - | 0.8 | mA |
| Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz) | Vn | - | - | 75 | μV |
| Ripple Rejection (IO = 100 mA, f = 120 Hz, 15 V ≤ VI ≤ 25 V) | RR | - | - | 55 | dB |
| 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 | - | - | ±0.3 | mV/°C |
| Peak Output Current (TJ = 25°C) | IO | - | - | 700 | mA |
Key Features
- No External Components Required: The MC78M12CDTG operates without the need for external components, simplifying the design process.
- Internal Thermal Overload Protection: Built-in thermal shutdown circuitry protects the device from overheating.
- Internal Short Circuit Current Limiting: The device includes internal current limiting to prevent damage from short circuits.
- Output Transistor Safe-Area Compensation: Ensures the output transistor operates within safe limits.
- High Accuracy: The MC78M00A series offers high accuracy with ±2% output voltage tolerance.
- Rugged and Reliable: Designed to be remarkably rugged under most operating conditions.
Applications
- Local, On-Card Voltage Regulation: Ideal for regulating voltage on individual circuit boards or cards.
- Automotive and Industrial Systems: The NCV prefix versions are suitable for automotive and other applications requiring robust performance.
- Embedded Systems: Used in various embedded systems where stable voltage regulation is critical.
- Power Supplies: Can be used in the design of power supplies where a stable output voltage is necessary.
Q & A
- What is the output voltage of the MC78M12CDTG?
The output voltage of the MC78M12CDTG is 12 V.
- What is the maximum output current of the MC78M12CDTG?
The maximum output current is 500 mA with adequate heatsinking.
- Does the MC78M12CDTG require external components to operate?
No, the MC78M12CDTG does not require external components to operate.
- What is the dropout voltage of the MC78M12CDTG?
The dropout voltage is 2.0 Vdc at TJ = 25°C.
- What is the short circuit current limit of the MC78M12CDTG?
The short circuit current limit is 350 mA at TJ = 25°C and VI = 35 V.
- What is the ripple rejection of the MC78M12CDTG?
The ripple rejection is 55 dB at IO = 100 mA and f = 120 Hz.
- What are the operating temperature ranges for the MC78M12CDTG?
The operating temperature ranges are from -40°C to +125°C.
- Is the MC78M12CDTG suitable for automotive applications?
- What is the average temperature coefficient of output voltage for the MC78M12CDTG?
The average temperature coefficient of output voltage is ±0.3 mV/°C at IO = 5.0 mA.
- What is the peak output current of the MC78M12CDTG?
The peak output current is 700 mA at TJ = 25°C.
