Overview
The MC78M15ACDTRKG is a 500 mA positive voltage regulator from onsemi, part of the MC78M00/MC78M00A Series. This regulator is designed for local, on-card voltage regulation and is identical to the popular MC7800 Series devices but with half the output current. It 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 | Min | Max | Unit | |
|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | 14.4 | 14.7 | 15 | Vdc |
| Output Voltage Variation (17.5 Vdc ≤ VI ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 350 mA) | 14.25 | - | 15.75 | Vdc |
| Line Regulation (TJ = 25°C, 17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA) | - | 10 | 50 | mV |
| Load Regulation (TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA) | - | - | 30 | mV |
| Dropout Voltage (TJ = 25°C) | - | 2.0 | - | Vdc |
| Short Circuit Current Limit (TJ = 25°C, VI = 35 V) | - | 350 | - | mA |
| Average Temperature Coefficient of Output Voltage (IO = 5.0 mA) | - | ±0.3 | - | mV/°C |
| Peak Output Current (TJ = 25°C) | - | 700 | - | mA |
| Maximum Input Voltage | - | - | 35 | V |
| Maximum Operating Temperature | - | - | 125 | °C |
Key Features
- No external components required for operation.
- Internal thermal overload protection and short circuit current limiting.
- Output transistor safe-area compensation.
- High accuracy (±2%) for MC78M00A versions.
- ESD protection exceeding Human Body Model 2000 V per MIL-STD-883, Method 3015, and Machine Model Method 200 V.
- Available in various output voltages: 5.0 V, 8.0 V, 12 V, and 15 V.
Applications
The MC78M15ACDTRKG is suitable for a variety of applications requiring stable and regulated voltage. These include:
- Local, on-card voltage regulation in electronic devices.
- Power supplies for low to moderate current requirements.
- Automotive and industrial applications where reliability and robustness are critical.
- Embedded systems and IoT devices needing stable voltage regulation.
Q & A
- What is the maximum output current of the MC78M15ACDTRKG?
The maximum output current is 500 mA with adequate heatsinking.
- What are the available output voltages for the MC78M00 Series?
The available output voltages are 5.0 V, 8.0 V, 12 V, and 15 V.
- Does the MC78M15ACDTRKG require external components for operation?
No, it does not require external components for operation.
- What is the maximum operating temperature for the MC78M15ACDTRKG?
The maximum operating temperature is 125°C.
- What kind of ESD protection does the MC78M15ACDTRKG have?
The device has ESD protection exceeding Human Body Model 2000 V per MIL-STD-883, Method 3015, and Machine Model Method 200 V.
- What is the dropout voltage for the MC78M15ACDTRKG?
The dropout voltage is 2.0 Vdc.
- What is the short circuit current limit for the MC78M15ACDTRKG?
The short circuit current limit is 350 mA at VI = 35 V.
- What is the average temperature coefficient of output voltage for the MC78M15ACDTRKG?
The average temperature coefficient of output voltage is ±0.3 mV/°C at IO = 5.0 mA.
- What is the peak output current for the MC78M15ACDTRKG?
The peak output current is 700 mA at TJ = 25°C.
- What are some recommended design considerations for using the MC78M15ACDTRKG?
It is recommended to bypass the regulator input with a capacitor if the regulator is connected to the power supply filter with long wire lengths or if the output load capacitance is large. A 0.33 μF or larger tantalum, mylar, or other capacitor with low internal impedance at high frequencies should be chosen and mounted directly across the regulator’s input terminals.
