AP2122AK-2.5TRE1

Introduction

The AP2122AK-2.5TRE1 is a linear voltage regulator which belongs to a class of PMIC (Power Management ICs). It is a low-dropout (LDO) type, meaning that the input and output voltages are only slightly different, making it suitable for low power applications. It is widely used in various fields such as automotive, industrial, and consumer applications. In this article, we will look at the application field and working principle of the AP2122AK-2.5TRE1.

Application Field

The AP2122AK-2.5TRE1 is an ultra-low quiescent current, low dropout regulator. It is designed mainly for power supply systems with a low input voltage. The AP2122AK-2.5TRE1 is an ideal choice for applications requiring an output of 2.5 V with a maximum input voltage of 5.5 V and utilizes low noise P-channel MOSFETs. An on-chip power control circuit allows the AP2122AK-2.5TRE1 to operate in either stand-alone or synchronous operations. In addition, the AP2122AK-2.5TRE1 includes a wide range of voltage feedback, current limit and thermal shutdown features, making it suitable for automotive, industrial, and consumer applications. With high accuracy and low BOM count, the AP2122AK-2.5TRE1 is ideal for automotive power supplies, PoEPD controllers, on board TFT-LCD modules, broadcast receivers, and other low-power applications.

Working Principle

The AP2122AK-2.5TRE1 operates according to the concept of a voltage-mode control. When the voltage difference between the output voltage and the reference voltage is sensed, the device takes corrective action to allow the output voltage to remain constant. The checking of the output voltage is done at regular intervals via two resistor elements, one between the output and the output of the regulator and the other between the output and ground.

When the voltage difference from the output to the reference voltage is below the designed value, the AP2122AK-2.5TRE1 will increase the voltage level to attempt to match the reference voltage. On the other hand, if the voltage difference is higher than the designed value, the AP2122AK-2.5TRE1 will decrease the voltage level. Thus, the AP2122AK-2.5TRE1 attempts to keep the voltage difference at its designed value.

The AP2122AK-2.5TRE1 also uses a temperature feedback system with a temperature-sensing device. This temperature-sensing device can sense changes in the temperature of the device, and if the temperature rises above a certain threshold, the output voltage will be automatically reduced in order to protect the device from heat damage.

Conclusion

The AP2122AK-2.5TRE1 is a linear voltage regulator which is widely used in automotive, industrial, and consumer applications. It has an ultra-low quiescent current, a low dropout voltage, and a wide range of voltage feedback, current limit, and thermal shutdown features which make it suitable for a variety of applications. The AP2122AK-2.5TRE1 operates using a voltage-mode control system in order to maintain a constant output voltage, and it is also designed with a temperature feedback system to prevent it from overheating.