Overview
The MC78L09ACD is a positive voltage regulator produced by ON Semiconductor. It is part of the MC78L00A series, which are three-terminal low current positive voltage regulators. These devices are designed to provide a regulated output voltage of 9V with a maximum current of 100 mA. They are known for their simplicity, ruggedness, and performance advantages over traditional zener diode-resistor combinations. The MC78L09ACD features internal current limiting and thermal shutdown, making it suitable for a wide range of applications that require a stable and reliable voltage supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | 8.6 | 9.0 | 9.4 | Vdc |
| Input Voltage (Max) | - | - | 30 | V |
| Output Current (Max) | - | - | 100 | mA |
| Line Regulation (TJ = +25°C, IO = 40 mA) | 10.5 | - | 175 | mV |
| Load Regulation (TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA) | 5.0 | - | 60 | mV |
| Ripple Rejection (IO = 40 mA, f = 120 Hz, TJ = +25°C) | 37 | - | 57 | dB |
| Dropout Voltage (TJ = +25°C) | - | - | 1.7 | Vdc |
| Operating Temperature Range | 0°C | - | 125°C |
Key Features
- Fixed 9V output voltage with high accuracy.
- Maximum output current of 100 mA.
- Internal current limiting and thermal shutdown for enhanced reliability.
- No external components required in many applications.
- Low quiescent current and reduced output impedance compared to zener diode-resistor combinations.
- High ripple rejection ratio.
- Compact SO-8 package.
Applications
The MC78L09ACD is suitable for various applications requiring a stable and regulated 9V voltage supply. These include:
- Consumer electronics such as audio equipment and appliances.
- Industrial control systems and automation.
- Medical devices requiring stable voltage supplies.
- Communication equipment and networking devices.
- Automotive electronics where a reliable voltage regulator is essential.
Q & A
- What is the output voltage of the MC78L09ACD?
The output voltage of the MC78L09ACD is 9V. - What is the maximum output current of the MC78L09ACD?
The maximum output current is 100 mA. - Does the MC78L09ACD require external components?
No, in many applications, no external components are required. - What are the key protection features of the MC78L09ACD?
The device features internal current limiting and thermal shutdown. - What is the operating temperature range of the MC78L09ACD?
The operating temperature range is from 0°C to 125°C. - What is the ripple rejection ratio of the MC78L09ACD?
The ripple rejection ratio is between 37 dB and 57 dB. - What is the dropout voltage of the MC78L09ACD?
The dropout voltage is 1.7 Vdc. - In what package is the MC78L09ACD available?
The MC78L09ACD is available in an SO-8 package. - What are some typical applications of the MC78L09ACD?
Typical applications include consumer electronics, industrial control systems, medical devices, communication equipment, and automotive electronics. - Where can I find detailed specifications for the MC78L09ACD?
Detailed specifications can be found in the datasheet available on the ON Semiconductor website or through distributors like Heisener and RF Microwave.
