AP7343-25FS4-7B

Voltage Dropout (Max):	0.3V @ 300mA
Supplier Device Package:	X2-DFN1010-4
Package / Case:	4-XDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current
Control Features:	Enable
PSRR:	75dB (1kHz)
Current - Quiescent (Iq):	60µA
Current - Output:	300mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	5.25V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The AP7343-25FS4-7B is a linear voltage regulator manufactured by APEC, a Taiwanese company that specializes in power conversion products. This voltage regulator is designed to support a wide range of applications, from simple start/stop operations to more complex monitoring and control. Its most important feature is its ability to regulate the output voltage with near-zero ripple, making it ideal for use in applications with sensitive analog components. In this article, we will discuss the application fields and working principle of the AP7343-25FS4-7B voltage regulator.

Application Fields

The AP7343-25FS4-7B has a wide range of application fields. It can be used for all types of low-voltage DC voltage regulation, including equipment such as cameras, DVD players and smartphones. It is also commonly used in automotive systems where a wide input voltage range is needed, such as power windows, automatic doors and motor controls. In addition, it can be used in industrial and telecommunications equipment, medical equipment, consumer electronics, gaming consoles and other electronic devices. The AP7343-25FS4-7B has a wide operating temperature range of -40°C to 85°C, making it suitable for use in extreme temperature environments. It also features an over-temperature protection that prevents the device from malfunctioning due to excessive heat. In addition, its low power dissipation can reduce the total power consumption of the system and prolong the service life of the device.

Working Principle

The AP7343-25FS4-7B is a three-terminal positive voltage regulator that uses a linear regulation technique to provide a regulated output voltage. This voltage regulator utilizes a transistor integrated circuit clamp voltage to regulate the output voltage to a precise and stable level. The voltage regulator includes a reference voltage generator, an error amplifier connected to the reference voltage generator, a P-channel power MOSFET which is connected to the output voltage, and four resistors. The reference voltage generator is used to provide the reference voltage for the circuit and is typically set to a value between 5.0V and 7.0V. The other resistors are used to provide a predetermined amount of current to the error amplifier. The error amplifier compares the reference voltage with the output voltage and, if there is a difference, increases or decreases the MOSFET gate to adjust the output voltage.The AP7343-25FS4-7B also has a thermal shutdown feature which will shut off the regulator when the operating temperature reaches a certain threshold. This feature prevents the regulator from being damaged due to excessive heat.

Conclusion

The AP7343-25FS4-7B voltage regulator is an ideal choice for a wide range of applications due to its wide operating temperature range, low power dissipation and high efficiency. Its ability to regulate the output voltage with near-zero ripple makes it suitable for use in sensitive analog applications. The AP7343-25FS4-7B works by using a linear regulation technique and a reference voltage generator, error amplifier and four resistors to precisely regulate the output voltage. It also has an over-temperature protection feature which prevents the device from malfunctioning due to excessive heat.

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