Overview
The MC78M05ABDTG is a 500 mA positive voltage regulator from onsemi, part of the MC78M00/MC78M00A series. This three-terminal regulator is designed for local, on-card voltage regulation and is specified for half the output current of the popular MC7800 series. It is available in various voltage options, including 5.0 V, 8.0 V, 12 V, and 15 V, with the MC78M05ABDTG specifically providing a regulated output voltage of 5.0 V.
The device features internal thermal overload protection, internal short circuit current limiting, and output transistor safe-area compensation, making it robust under most operating conditions. It requires no external components for operation and is suitable for applications requiring reliable and stable voltage regulation.
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 |
| Input Voltage | VI | 7.0 | - | 20 | Vdc |
| Maximum Output Current (with adequate heatsinking) | IO | - | - | 500 | mA |
| Line Regulation (TJ = 25°C, 8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA) | Regline | - | - | 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 |
| Operating Junction Temperature Range | TJ | -40 | - | 125 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
Key Features
- No external components required for operation.
- Internal thermal overload protection to prevent damage from excessive power overload.
- Internal short circuit current limiting to protect against short circuits.
- Output transistor safe-area compensation to reduce output short circuit current.
- High accuracy output voltage (±2% for MC78M00A series).
- ESD protection exceeding Human Body Model 2000 V per MIL-STD-883, Method 3015, and Machine Model Method 200 V.
Applications
The MC78M05ABDTG is suitable for a variety of applications requiring stable and reliable voltage regulation, including:
- Local, on-card voltage regulation in electronic devices.
- Power supplies for low to moderate current requirements.
- Automotive and industrial control systems where robustness and reliability are critical.
- Consumer electronics requiring stable voltage outputs.
Q & A
- What is the maximum output current of the MC78M05ABDTG?
The maximum output current, with adequate heatsinking, is 500 mA.
- What are the key protection features of the MC78M05ABDTG?
The device features internal thermal overload protection, internal short circuit current limiting, and output transistor safe-area compensation.
- What is the typical output voltage of the MC78M05ABDTG?
The typical output voltage is 5.0 V.
- What is the dropout voltage of the MC78M05ABDTG?
The dropout voltage is 2.0 Vdc at TJ = 25°C.
- Does the MC78M05ABDTG require any external components for operation?
No, the MC78M05ABDTG does not require any external components for operation.
- What is the operating junction temperature range of the MC78M05ABDTG?
The operating junction temperature range is -40°C to 125°C.
- What is the storage temperature range of the MC78M05ABDTG?
The storage temperature range is -65°C to 150°C.
- What type of ESD protection does the MC78M05ABDTG have?
The device exceeds Human Body Model 2000 V per MIL-STD-883, Method 3015, and Machine Model Method 200 V.
- What are some common applications for the MC78M05ABDTG?
Common applications include local, on-card voltage regulation, power supplies, automotive and industrial control systems, and consumer electronics.
- How should the input of the MC78M05ABDTG be bypassed for stable operation?
The regulator input should be bypassed with a capacitor (e.g., 0.33 μF or larger) having good high frequency characteristics, especially if the regulator is connected to the power supply filter with long wire lengths or if the output load capacitance is large.
