XC9236A33CER-G

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XC9236A33CER-G is a chip belonging to the PMIC (Power Management IC) family, specifically a DC DC switching regulator. It is a highly integrated chip fabricated in CMOS process, which incorporates a synchronous rectifier and a feedback amplifier. This chip is extensively used in many industries for its low power consumption, fast response time and consistent output voltage.

General Application

XC9236A33CER-G is usually deployed in fully integrated circuits such as LCD displays, HDDs, portable systems, and digital photography equipment. It is also integrated in circuit boards, where voltage conversion is needed and space is limited. This feature allows its integration in power strapped and miniaturized products.

Functionality

The chip works as a step-down DC to DC converter, and its main function is to reduce voltage. Its main characteristic is to offer wide range of input voltage, allowing it to operate from either 3V or 5V supply ranges. XC9236A33CER-G also offers a wide range of output voltage, from 0.8V to 4V. Other key features of this PMIC are its low operating quiescent current and its high efficiency, allowing it to reach up to 90% efficiency.

Advantages and Limitations

The main advantages that the XC9236A33CER-G offer are the wide input voltage range, and the low power consumption with high efficiency. Additionally, it offers protection features as short-circuit protection, over temperature protection and over voltage protection, making it suitable for safety-critical applications. Its downside is that it is a bulky device (6.9 x 6.9 mm), and its minimum current level is 0.6 A, making it unsuitable for low current applications.

Working Principle

The XC9236A33CER-G works under unity-gain mode and operates on the basic principle of supplying a constant current to a synchronous rectifier connected to a load. The current is managed by a feedback loop using a current limit amplifier and a MOSFET driver. In response to demand changes, the chip increases or decreases the load current. It does this by switching on and off the switches. To ensure output voltage regulation, the chip uses a voltage-divider feedback.

When the current is high, the MOSFETs are turned off and no current passes. When the current is low, the chip senses the voltage drop across the MOSFETs and switches on the gate, allowing the current to flow. This allows the converter to constantly maintain the output current, while controlling its voltage. In order to guarantee high efficiency, the chip simultaneously uses peak current limitation and output voltage regulation.

Conclusion

The XC9236A33CER-G belongs to the PMIC family DC DC switching regulator, offering key features such as high efficiency and low power consumption, wide range of input and output voltage, and protections features. Its main disadvantage is its size, making it unsuitable for devices that demand miniaturization. Moreover, its minimum current level is relatively higher than other chips. Due to its capability to offer all these features, the XC9236A33CER-G is extensively used in many industries, such as LCD displays, HDD, portable systems and digital photography equipment.

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