AP1122TL-U

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AP1122TL-U is a step-down voltage regulator with integrated power switches. It is widely used in applications where high current supply, low cost and low quiescent current are demanded. It is popularly used in industrial, automotive and consumer electronics.

Working principle:

AP1122TL-U adopts a topology of buck converter to achieve voltage regulation. It incorporates a silicon integrated power MOSFET to achieve high efficiency mileage. When the voltage applied across input pin is higher than the output voltage, the power MOSFET will be on and the current will flow from input pin to the output pin and into the load. During this process, the cycle by cycle current limit and voltage limit will be triggered to ensure that the output voltage is regulated and safe.

Applications:

AP1122TL-U has various applications, such as:

• Automotive: Charging system, power train, safety system, etc
• Consumer electronics: Smart phones, tablets computers, navigation systems, etc
• Industrial applications: Motors and motor drives, valves, pumps, lighting, etc

The chip has wide input voltage range from 4.75V to 16V and adjustable output voltage from 0.8V to 5V. It also offers wide temperature range from -40℃ to +125℃ to enable its use in harsh environment applications. Moreover, its high efficiency also makes it widely used in backup power supply, especially in the cases where quick and reliable power up is needed in batteries or other embedded systems.

AP1122TL-U comes in two packages: SOP-8 and WQFN20. It provides built in current limit protections and fault protection for over current, short to ground, short to battery, or reverse battery. It also features a thermal shutdown protection, an enable pin and an UVLO function.

In conclusion, AP1122TL-U is an ideal voltage regulator solution for a wide range of applications, combining high efficiency, good cost and reliable performance. With its wide input voltage range and adjustable output voltage, it can cover most of the applications in industrial, automotive and consumer electronics.

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