Overview
The MC78M12CDTT5G 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 ruggedness and reliability under various operating conditions, thanks to 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 | 12.00 | 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 | - | 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 |
| Quiescent Current Change (14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) | ΔIIB | - | - | 0.8 | mA |
| Dropout Voltage (TJ = 25°C) | VI-VO | - | 2.0 | - | Vdc |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | IOS | - | 350 | - | mA |
| Peak Output Current (TJ = 25°C) | IO | - | 700 | - | mA |
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)
- Available in various output voltages: 5.0 V, 8.0 V, 12 V, and 15 V
- NCV prefix for automotive and other applications requiring high reliability
Applications
The MC78M12CDTT5G is suitable for a variety of applications requiring stable and regulated voltage, including:
- Local, on-card voltage regulation in electronic devices
- Automotive systems (with NCV prefix models)
- Industrial control systems
- Consumer electronics
- Telecommunication equipment
Q & A
- What is the maximum output current of the MC78M12CDTT5G? The maximum output current is 500 mA with adequate heatsinking.
- What are the key features of the MC78M12CDTT5G? 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 output voltage range for the MC78M12CDTT5G? The output voltage range is 11.50 V to 12.50 V.
- What is the line regulation of the MC78M12CDTT5G? The line regulation is up to 50 mV for input voltages between 14.5 Vdc and 30 Vdc at an output current of 200 mA.
- What is the dropout voltage of the MC78M12CDTT5G? The dropout voltage is up to 2.0 Vdc.
- Is the MC78M12CDTT5G suitable for automotive applications? Yes, especially with the NCV prefix models which are designed for high reliability in automotive and other demanding applications.
- What is the temperature range for the MC78M12CDTT5G? The operating temperature range is from 0°C to +125°C.
- Does the MC78M12CDTT5G require any external components for operation? No, it does not require any external components.
- What is the short circuit current limit of the MC78M12CDTT5G? The short circuit current limit is up to 350 mA.
- What is the peak output current of the MC78M12CDTT5G? The peak output current is up to 700 mA.
