Overview
The MC78M08CDT is a 500 mA positive voltage regulator from onsemi, part of the MC78M00/MC78M00A Series. These regulators are similar to the MC7800 Series but are specified for half the output current. They are designed for local, on-card voltage regulation and are known for their ruggedness under most operating conditions. The MC78M08CDT specifically provides an output voltage of 8.0 V.
Key Specifications
| Characteristics | Symbol | Min | Max | Unit | |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 7.70 | 8.0 | 8.30 | Vdc |
| Output Voltage Variation (10.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA) | VO | 7.6 | - | 8.4 | Vdc |
| Line Regulation (TJ = 25°C, 10.5 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 |
| Peak Output Current (TJ = 25°C) | IO | - | - | 700 | mA |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | IOS | - | - | 50 | mA |
| Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) | ΔVO/ΔT | - | ±0.2 | - | mV/°C |
| Dropout Voltage (TJ = 25°C) | VI-VO | - | - | 2.0 | Vdc |
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 versions
- Available for various output voltages including 5.0 V, 8.0 V, 12 V, and 15 V
- NCV prefix available for automotive and other applications requiring enhanced reliability
Applications
The MC78M08CDT is suitable for a variety of applications requiring stable and regulated voltage. These include:
- Local, on-card voltage regulation in electronic devices
- Automotive systems (with NCV prefix)
- Industrial control systems
- Consumer electronics
- Telecommunication equipment
Q & A
- What is the maximum output current of the MC78M08CDT?
The maximum output current is 500 mA with adequate heatsinking.
- What is the output voltage of the MC78M08CDT?
The output voltage is 8.0 V, with a range of 7.70 V to 8.30 V at 25°C.
- What is the line regulation of the MC78M08CDT?
The line regulation is 6.0 mV to 50 mV at 25°C, with input voltage ranging from 10.5 Vdc to 25 Vdc and output current of 200 mA.
- Does the MC78M08CDT have internal thermal protection?
- What is the short circuit current limit of the MC78M08CDT?
The short circuit current limit is 50 mA at 25°C with an input voltage of 35 V.
- What is the average temperature coefficient of output voltage?
The average temperature coefficient of output voltage is ±0.2 mV/°C at an output current of 5.0 mA.
- What is the dropout voltage of the MC78M08CDT?
The dropout voltage is 2.0 Vdc at 25°C.
- Are there any specific versions for automotive applications?
- Do I need external components to use the MC78M08CDT?
No, the MC78M08CDT does not require external components.
- What is the peak output current of the MC78M08CDT?
The peak output current is 700 mA at 25°C.
