Overview
The MC78M05ACT is a 500 mA positive linear voltage regulator from onsemi, part of the MC78M00/MC78M00A Series. This regulator is similar to the popular MC7800 Series devices but is specified for half the output current. It is designed for local, on-card voltage regulation and features internal current limiting, thermal shutdown circuitry, and safe-area compensation for the internal pass transistor, making it robust under various operating conditions.
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 | 4.9 | - | 5.1 | 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 |
| 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 | - | ±0.2 | - | mV/°C |
| 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)
- 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 MC78M05ACT is suitable for a variety of applications requiring stable and regulated voltage. These include:
- Local, on-card voltage regulation in electronic devices
- Automotive systems (NCV prefix models)
- Industrial control systems
- Consumer electronics
- Telecommunication equipment
Q & A
- What is the maximum output current of the MC78M05ACT?
The maximum output current of the MC78M05ACT is 500 mA with adequate heatsinking.
- What are the output voltage ranges for the MC78M05ACT?
The output voltage range for the MC78M05ACT is between 4.8 V and 5.2 V at TJ = 25°C.
- Does the MC78M05ACT require external components?
No, the MC78M05ACT does not require external components for operation.
- What is the dropout voltage of the MC78M05ACT?
The dropout voltage of the MC78M05ACT is 2.0 V at TJ = 25°C.
- What is the short circuit current limit of the MC78M05ACT?
The short circuit current limit of the MC78M05ACT is 350 mA at TJ = 25°C and VI = 35 V.
- What is the average temperature coefficient of output voltage for the MC78M05ACT?
The average temperature coefficient of output voltage for the MC78M05ACT is ±0.2 mV/°C at IO = 5.0 mA.
- Is the MC78M05ACT ESD protected?
- What are the temperature ranges for the MC78M05ACT?
The temperature range for the MC78M05ACT is -40°C to +125°C for some models and 0°C to +125°C for others.
- Is the MC78M05ACT suitable for automotive applications?
- What is the line regulation of the MC78M05ACT?
The line regulation of the MC78M05ACT is 5.0 mV to 50 mV at TJ = 25°C and IO = 200 mA.
