AP2125KC-4.2TRG1

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PMIC - Voltage Regulators - Linear

The AP2125KC-4.2TRG1 is a linear voltage regulator designed for those applications that require a minimally invasive solution for reset and power supply adjustments. This integrated circuit can precisely provide a user input voltage, voltage setting, and a current limit setting for each channel. It also provides a precision voltage reference of 4.2 volts for voltage setting, reset timing, and system level regulation.

The AP2125KC-4.2TRG1 is designed with a low output impedance in order to ensure a stable output voltage, even under rapid load changes. In addition, it features a low quiescent current, which keeps the power dissipation low. This regulator includes an operating frequency up to 25MHz, allowing it to offer an output voltage that can remain within 4.2V of the input voltage under varying load conditions, with an accuracy of ±5%.

Applications

The AP2125KC-4.2TRG1 can be used in various applications that require precise power supply regulation and reset, such as mobile phone base transceiver stations, automotive electronics, portable audio-video equipment, GPS receivers, digital signal processors, and other electronic circuits. It can also be used to provide a stable output voltage in LCD monitors and digital media players, particularly in those where the system needs to remain in compliance with low power and high accuracy requirements.

Working Principle

The AP2125KC-4.2TRG1 voltage regulator is based on a linear architecture, in which the output voltage is a fixed ratio of the input. The first stage of the circuit is a series of resistors, capacitors, and an amplifier that form a voltage divider. The voltage divider works by distributing the input voltage into two output voltages, one of which is the regulated output voltage Vref, and the other is the current limit setting output voltage Vlim. The two outputs are then fed into two separate voltage-controlled transistors that act as switches. The output voltage of the voltage regulator is determined by the Vref and Vlim settings, and is determined by the ratio between these two values.

The AP2125KC-4.2TRG1 also includes a voltage reference of 4.2V, which ensures a consistent and stable output voltage. The reference voltage serves as the ground reference point for the voltage control and setting circuit, as well as for the reset timing and system level regulation circuit. In addition, each channel has an independent enable and current limit settings, which allow the user to customize the regulator to the application.

The AP2125KC-4.2TRG1 is an ideal option for applications that require a simple, low-cost, and efficient linear voltage regulator. Its precision references, low output impedance, and low quiescent current ensure a stable output voltage over varying load conditions, providing accuracy and reliability in a wide range of applications.

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