Overview
The MC78M05BT 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 ruggedness under various operating conditions. The MC78M05BT provides a stable output voltage of 5.0 V and features 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 | 4.8 | 5.0 | 5.2 | Vdc |
| Output Voltage Variation (7.0 Vdc ≤ VI ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 350 mA) | VO | 4.7 | - | 5.3 | Vdc |
| Line Regulation (TJ = 25°C, 8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) | Regline | - | 5.0 | 50 | mV |
| Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) | Regload | - | - | 20 | 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 |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | IOS | - | 350 | - | 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 versions
- ESD Protection: Human Body Model 2000 V per MIL-STD-883, Method 3015; Machine Model Method 200 V
- NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable
Applications
The MC78M05BT is suitable for various applications requiring stable and regulated voltage, including local on-card voltage regulation in electronic devices, automotive systems (with the NCV prefix), and other industrial applications where reliability and ruggedness are critical.
Q & A
- What is the output voltage of the MC78M05BT? The output voltage of the MC78M05BT is 5.0 V.
- What is the maximum output current of the MC78M05BT? The maximum output current is 500 mA with adequate heatsinking.
- Does the MC78M05BT require external components? No, the MC78M05BT does not require external components.
- What kind of protection does the MC78M05BT have? The MC78M05BT has internal thermal overload protection and internal short circuit current limiting.
- Is the MC78M05BT suitable for automotive applications? Yes, the NCV prefix versions are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other demanding applications.
- What is the average temperature coefficient of output voltage? The average temperature coefficient of output voltage is ±0.2 mV/°C.
- What is the peak output current of the MC78M05BT? The peak output current is 700 mA at TJ = 25°C.
- How does the MC78M05BT handle short circuits? The MC78M05BT has a short circuit current limit of 350 mA at TJ = 25°C and VI = 35 V.
- What is the line regulation of the MC78M05BT? The line regulation is 5.0 to 50 mV for 8.0 Vdc ≤ VI ≤ 25 Vdc and IO = 200 mA.
- What is the load regulation of the MC78M05BT? The load regulation is 20 mV for 5.0 mA ≤ IO ≤ 500 mA.
