AN79L09

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Output Configuration:	Negative
Output Type:	Fixed
Number of Regulators:	1
Voltage - Input (Max):	-35V
Voltage - Output (Min/Fixed):	-9V
Voltage - Output (Max):	--
Voltage Dropout (Max):	--
Current - Output:	100mA
Current - Quiescent (Iq):	5mA
PSRR:	53dB (120Hz)
Control Features:	--
Protection Features:	Over Current, Over Temperature
Operating Temperature:	0°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package:	3-SSIP
Base Part Number:	AN79L09

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AN79L09 Application Field & Working Principle

Introduction

The AN79L09 is a Linear Voltage Regulator (LVR) that belongs to the Power Management Integrated Circuit (PMIC) category. It is an improved version of the μPA79L-09, a Positive Voltage Regulator integrated circuit that provides a regulated output voltage of +9V. The AN79L09 is designed for use in laptop and other electrical appliances where the demand of power efficiency is high and the output power needs to be regulated. It is suitable for general-purpose use, with its wide-range operating voltage, adjustable or fixed output voltage and good thermal characteristics.

Specifications

The AN79L09 offers users a regulated output voltage of +9V with a 2.0V minimum drop-out voltage, and a variable output voltage range from about +1V to +25V. The total package power dissipation is 600mW, with an output current of 200mA in continuous mode and up to 1A in short-term peak mode. The maximum junction temperature of the integrated circuit is 140°C, and it has an over-temperature protection feature that limits the junction temperature to 150°C. The IC also has a low quiescent current and a low voltage drop-out feature, with a quiescent current of 5mA and a drop-out voltage of 0.5V at 200mA.

Features

The AN79L09 is equipped with built-in protection features that provide an added level of safety and reliability. These features include over-voltage protection, reverse current protection, low voltage protection and over-temperature protection. The IC also has an adjustable output voltage that can be controlled using two pins, allowing the user to adjust the output voltage to their application’s requirement.The AN79L09 has a low output noise level and is designed for use in applications with strict noise requirements. Additionally, the IC has excellent heat dissipation characteristics, ensuring smooth and reliable operation even during heavy loads and high temperatures.

Applications

The AN79L09 is ideal for use in automotive and laptop applications, where the demand of power efficiency is high and the output power needs to be regulated. It is also suitable for general-purpose use, providing users with the adjustable output voltage and wide-range operating voltage that they require. Furthermore, due to its low noise performance and good thermal characteristics, the AN79L09 is suitable for applications that have strict noise requirements and need reliable operation even during heavy loads and high temperatures.

Working Principle

The AN79L09 works by converting an unregulated DC voltage into a regulated DC output. In this circuit, the unregulated DC voltage is applied to the input pin of the IC and it is passed through the internal circuitry of the IC. The voltage is then converted into a regulated DC voltage by the internal power MOSFETs and output pins of the IC. These MOSFETs ensure that the output voltage remains constant, even under varying load conditions, and that the voltage drop-out is minimized.The internal circuitry of the AN79L09 is designed to work with two input pins. The first input pin is the input voltage regulator, which is used to control the voltage supplied to the IC. The second input pin is the output voltage regulator, which is used to control the output voltage of the IC. The user can adjust the output voltage to a suitable level by adjusting the voltage of the output voltage regulator.

Conclusion

The AN79L09 is a Linear Voltage Regulator (LVR) belonging to the Power Management Integrated Circuit (PMIC) category. It is designed for use in laptop and other electrical appliances that require a regulated output voltage of +9V with a 2.0V minimum drop-out voltage. The IC offers users a variable output voltage range from about +1V to +25V, and it has built-in protection features that provide added safety and reliability.The user can adjust the output voltage to a suitable level using two input pins, and the IC also has an excellent noise performance and good thermal characteristics. The AN79L09 is suitable for use in automotive and laptop applications, where the demand of power efficiency is high and the output power needs to be regulated, as well as for general-purpose use.

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