MC79L05ACLPM

Voltage Dropout (Max):	1.7V @ 40mA
Base Part Number:	MC79L05A
Supplier Device Package:	TO-92-3
Package / Case:	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	49dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-5V
Voltage - Input (Max):	-20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Obsolete
Packaging:	Tape & Box (TB)

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Introduction
The MC79L05ACLPM is a three-terminal, 0.5A, low-power linear voltage regulator by ON Semiconductor. It is a monolithic integrated voltage regulator, which can be used to output a fixed voltage from an input source of varying magnitude and varying load current. The MC79L05ACLPM has a guaranteed maximum output current of 0.5A, and is active from an input voltage as low as 2.0V to an input voltage as high as 15V. It has a wide range of applications in the industrial and consumer electronics field, such as computer motherboards and appliances, industrial controllers, cameras, LCD TVs, and countless other devices.

Application Field
The MC79L05ACLPM is a versatile, practical and cost-effective solution that can be used in many applications as a low-power, low-voltage linear regulator. It can be used to provide power to low- power, low-voltage digital circuits, such as logic circuits, Memory chips, and small static RAMs. It is also suitable for powering audio amplifiers and other high frequency circuits, since the regulation is good even with the wideband ripple frequencies. The device can also be used in power supply circuits, where it can provide regulated voltage when used in conjunction with a Zener diode. Another typical application would be at home, to provide a regulated DC voltage directly from an AC source. The MC79L05ACLPM is useful in all of these applications, and is an essential component for many engineers and DIY enthusiasts.

Working principle
The working principle of the MC79L05ACLPM is simple, yet efficient. It is based on the operation of two transistors, each with its own internal voltage reference. In the process of regulating the output voltage, one of the two transistors is turned on through external connection, while the other is turned off, creating a virtual open circuit in the output stage. The MC79L05ACLPM works by varying the current through the transistors to maintain a fixed output voltage, regardless of the input voltage, load current, and temperature. The device is able to maintain a stable, constant output voltage over a wide range of input voltage, load current, and temperature.

Conclusion
The MC79L05ACLPM is a reliable and cost-effective low-power linear regulator from ON Semiconductor. It is suitable for a wide range of applications, such as low-power digital circuits, audio amplifiers, and power supply circuits. The device is capable of delivering a fixed output voltage, even in the face of varying input voltage, load current, and temperature. Its simple working principle, based on two transistors, makes the device easy to use and understand. The MC79L05ACLPM is a great solution for applications where a low-power, low-voltage regulator is needed.

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