ACT4529YH-T0001

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PMIC - Voltage Regulators - DC DC Switching Regulators

Introduction

The ACT4529YH-T0001 is a low quiescent-current, high efficiency switching voltage regulator. It offers a wide input voltage range of 1.5V to 5.5V, an adjustable output voltage of 2.5V to 4.5V and can deliver up to 3A of output current. It is an ideal solution for low power and portable systems, such as mobile phones, PDAs, and digital cameras.

Application Field

The ACT4529YH-T0001 is an excellent choice for a variety of power management applications, such as battery and power supplies, microprocessors, FPGA and ASIC, LCD panel, and other digital logic. It can provide a reliable and efficient voltage regulation for high current and low power requirements.

The ACT4529YH-T0001 also features a power saving function, which reduces power dissipation and enables longer battery life. This feature can be activated when the output voltage is below the preset threshold and current limitation. Additionally, the output voltage can be adjusted through the external reference voltage and the feedback pin. In addition, the output voltage is protected from over voltage, over-current, and over temperature condition.

Working Principle

The ACT4529YH-T0001 works in fixed frequency mode with pulse width modulation (PWM) control. It converts an input voltage to a regulated output voltage with a switching controller. When the input voltage rises to the preset threshold, the switch turns on, and the input voltage is regulated by the switching controller according to the voltage setting defined by the external reference voltage and feedback pin. When the input voltage is below the preset threshold the switch is turned off. This reduces power consumption and power dissipation.

The switching controller also has other features, such as adjustable frequency, adjustable duty-cycle, and adjustable current limit. These features enable the switching regulator to be used in a variety of applications and make it highly efficient. Furthermore, an external soft start circuit can be used to limit the inrush current and reduce the amount of power consumed during startup.

Conclusion

The ACT4529YH-T0001 is a low quiescent-current, high efficiency switching voltage regulator with a wide input voltage range and adjustable output voltage. It can provide stable voltage regulation for a variety of power management applications and its additional features, such as adjustable frequency and adjustable duty-cycle, enable the regulator to be used in a variety of applications. The output voltage is also protected from over voltage, over-current, and over temperature condition. Therefore, it is an ideal solution for low power and portable systems, such as mobile phones, PDAs, and digital cameras.

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