AP7343D-10W5-7

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Introduction

AP7343D-10W5-7 is a Voltage Regulator in the Linear PMIC (Power Management Integrated Circuit) family. It is a low dropout 3.3V 10A voltage regulator which integrates several features to ensure reliable operation while addressing various application needs.

Application Field

The AP7343D-10W5-7 is suitable for applications where precise voltage regulation of low input voltage sources is required such as industrial devices, automotive solutions, battery-powered devices, IoT devices, medical devices, etc. It is characterized by high accuracy, low noise, fast transient response and excellent line regulation. Due to its many features, it is suitable for applications with stringent requirements.

Features

The AP7343D-10W5-7 features a low quiescent current of 10mA and a Dropout Voltage of 0.8V, which ensures efficient power-on start-up even at low input voltage. It also incorporates a fast transient response of 10μs, which allows it to quickly respond to changes in load and input voltage. Additionally, it is also capable of providing high accuracy regulation with a ±1% voltage regulation line accuracy and a ±2% load regulation. It also has protection against reverse current, thermal shutdown, output overvoltage, current foldback, and over current.

Working Principle

The AP7343D-10W5-7 operates on the principle of Voltage Regulation. It is designed to maintain a constant output voltage when the load or input voltage changes. The voltage regulator is a closed loop control that works by comparing the output voltage to a reference voltage which is set by a resistor divider. When the output voltage rises, the errors amplifier compares it with the reference voltage and attempts to decrease it. Conversely, when the output voltage drops, the error amplifier attempts to increase it. This is accomplished by altering the power transistor base drive which increases or decreases the transistor\'s base current. As a result, the amount of current supplied to the load is adjusted and the output voltage is regulated.

Conclusion

The AP7343D-10W5-7 is a low dropout 3.3V 10A voltage regulator ideal for applications where precise voltage regulation of low input voltage sources is necessary. It offers low dropout voltage, low quiescent current and high accuracy voltage regulation with a ±1% line accuracy and ±2% load accuracy. Additionally, it is also equipped with thermal protection, diode emulation, current foldback, output overvoltage, reverse current protection and over current protection. By combining all these features, it ensures reliable operation for applications with stringent requirements.

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