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PMIC - Voltage Regulators - Linear

AP1122YL-13 is a high performance, low dropout linear regulator. It takes input voltage 3.2V to 8V and turns it into adjustable output voltage up to 17V. It is designed to provide up to 2A of continuous current and offers a very small quiescent current. The device features low-noise operation, high accuracy, low output ripple, and low temperature coefficient. Additionally, it provides an internal over-temperature protection.

The heart of the AP1122YL-13 is its internal voltage reference, an on-board voltage reference allows the output voltage of the regulator to be set accurately without the need for an external resistor. This built-in voltage reference eliminates external adjustment components, resulting in significant savings in board space and cost. The on-board reset circuit allows the reset line to be applied directly to the IC for fast response time.

AP1122YL-13 is well suited for use in portable electronic products. It is widely used for low voltage power supply, multi-channel display, consumer electronic products, RF backbone, etc. The low quiescent current allows the device to be used in Energy Star applications, helping to reduce power consumption and prolong battery life. In addition, the wide operating temperature range ensures the product\'s stable performance in extreme temperatures.

The working principle of the AP1122YL-13 is relatively simple. It employs a 3-terminal design, with a voltage reference set by a resistor divider. The device works by comparing the internal reference voltage with an external feedback voltage. Voltage is adjustable via a feedback resistor network. When the input voltage rises above the preset reference voltage, the device output responds quickly, thus providing a regulated voltage. By maintaining the output voltage sensitively, the AP1122YL-13 can prevent overshoots and undershoots, resulting in a stable output voltage.

The AP1122YL-13 also features a built-in protection circuit to protect against thermal overload and current over-load. It limits the peak output current and protects the device from damage due to over-temperature. Furthermore, the IC has an internal soft-start that prevents inrush current, making it ideal for use in applications where minimum power supply disturbance is desired.

In conclusion, the AP1122YL-13 is a highly integrated linear voltage regulator designed to deliver low noise, low dropout, stable output voltage and current in a wide range of applications. Its low power consumption, integrated protection and low cost make it an ideal choice for a wide variety of applications.

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