MC79L15ACPRA

Voltage Dropout (Max):	1.7V @ 40mA (Typ)
Base Part Number:	MC79L**A
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:	39dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-15V
Voltage - Input (Max):	-35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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MC79L15ACPRA Application Field and Working Principle

PMIC (Power Management Integrated Circuits) are circuits that are designed to control various aspects of power within electronic devices. Voltage regulators are one of the basic components of a PMIC, and they regulate the amount of power that is supplied to an electronic device. The MC79L15ACPRA is a three terminal Negative Voltage Regulator from the Linear Regulator family. It is used to regulate the supply of voltage for applications where negative voltage output greater than 15V is required.The MC79L15ACPRA is a monolithic, adjustable negative voltage regulator that is designed to provide regulated output voltages of anywhere between -15V to -24V. It is an improved version of the industry standard 79L15 type regulator chip, as it has an improved line regulation, lower quiescent current, and better temperature stability.The MC79L15ACPRA is commonly used in applications such as computer systems and peripherals, audio and industrial control equipment, and cellular phones, as it provides a reliable source of power at a wide range of voltages. It is also used in devices such as LED drivers, battery powered equipment, laser bar code scanners, and more.The MC79L15ACPRA is a highly efficient regulator that has a wide voltage range Input of up to 40V and adjustable output range of -15V to -24V. It is also designed to have good temperature stability, allowing it to maintain a consistent output voltage over a wide range of temperatures. The device also has an overload protection circuit built into its design, which helps protect the device from short circuits and over currents.The MC79L15ACPRA uses an internal PNP transistor to regulate the output voltage. The current from the external load is passed through this transistor, which uses its base-emitter junction to control the current flowing through the output. This transistor acts as a variable resistor, and can be adjusted by varying the voltage across the base-emitter junction.The adjustment voltage is provided through a resistive divider connected to the Adjust Pin of the MC79L15ACPRA, which is also connected to the emitter of the internal PNP transistor. The voltage applied to the adjust pin acts as a reference voltage to the transistor, and can be adjusted using the resistive divider. This adjustment voltage is then compared to the output voltage, and the internal transistor will adjust its resistance accordingly, providing the correct regulated output voltage.The MC79L15ACPRA also provides excellent ripple rejection, making it ideal for applications that require a stable output voltage. It also provides a low output impedance, ensuring that the output voltage does not vary significantly with changes in load current. This feature is especially important for sensitive electronics applications.Overall, the MC79L15ACPRA is a highly versatile, efficient and reliable device. It can be used in a wide variety of applications where a negative voltage output of 15V to 24V is required. Its adjustable output range, overload protection, and good ripple rejection makes it an ideal solution for all sorts of negative voltage regulation scenarios.

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