AS7812AT-E1

Voltage Dropout (Max):	2V @ 1A (Typ)
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	60dB (120Hz)
Current - Quiescent (Iq):	6mA
Current - Output:	1A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	32V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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Introduction

AS7812AT-E1 is a high performance, low noise, linear voltage regulator with low power dissipation. It provides low dropout voltage, high efficiency and excellent temperature stability. It is capable of providing adjustable output voltage from 0V to 20V and up to 1.3A of current. The AS7812AT-E1 can also be used for applications such as boosting or bucking a voltage. The product also features a built-in thermal shut down and short circuit protection as well as over current and over temperature protection. The device is available in a compact 14-pin SOP package, making it ideal for space-limited applications. This makes it perfect for use in a wide range of applications such as mobile phones, laptops, power amplifiers, motor control and many others.

Applications

The AS7812AT-E1 is ideal for use in mobile phones, laptops, power amplifiers, motor control, industrial and automotive applications. It can be used in a variety of power system design solutions as a single supply, wide input DC/DC converter for low voltage or high current applications. The product also has a wide adjustable range of output voltage from 0V to 20V, making it a versatile regulator for a wide range of applications. Its low dropout voltage and low power dissipation make it ideal for high efficiency designs.

Features

The AS7812AT-E1 offers a wealth of features to help ensure reliable performance and robust operation. Some of these features include:

• Low dropout voltage of 0.15V @ 1.3A.
• High efficiency up to 95%.
• Wide adjustable voltage range of 0V to 20V.
• Built-in thermal shut down and short circuit protection.
• Over current and over temperature protection.
• Available in a compact 14-pin SOP package.

Working Principle

The working principle of the AS7812AT-E1 is based on a linear regulator topology. The device is designed to convert a given input voltage to a regulated output voltage. The device consists of three main components; a pass transistor, a reference voltage, and an error amplifier. The pass transistor is used to regulate the output voltage and the reference voltage is used as a reference for adjusting the output voltage. The error amplifier is used to monitor the output voltage and provide feedback to the pass transistor to ensure the output voltage remains within the specified range.When the input voltage is applied to the device, the error amplifier senses the output voltage. If the output voltage is lower than the reference voltage, the amplifier signal increases, turning on the pass transistor, which then allows more current to pass through, resulting in an increase in the output voltage. Similarly, if the output voltage is higher than the reference voltage, the amplifier signal decreases, turning off the pass transistor, which then causes less current to pass through and the output voltage will decrease. This cycle is repeated until the output voltage matches the reference voltage.

Conclusion

The AS7812AT-E1 is a high performance, low noise, adjustable output voltage, linear voltage regulator with low power dissipation. It can be used in a variety of power system design solutions as a single supply, wide input DC/DC converter for low voltage or high current applications. Its features include; low dropout voltage, wide adjustable voltage range, high efficiency, built-in thermal shut down and short circuit protection, over current and over temperature protection, and a compact 14-pin SOP package. The working principle of the device is based on a linear regulator topology and when the input voltage is applied, the device is able to regulate the output voltage to match the reference voltage.

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