AP131-15YL-13 Application Field and Working Principle

AP131-15YL-13 is an adjustable low drop-out (LDO) linear voltage regulator. It is a three-pin device, with an input voltage range from 1.2V to 3.6V and a fixed output voltage of 1.5V. The device has a very low drop-out voltage, meaning that the voltage drops very little when the device operates. It also features a high output current of 150mA, a remote sense capability and a fast transient response. Its TO-252-2L surface mount package makes it suitable for use in space-sensitive applications.

The application field for an AP131-15YL-13 is broad, ranging from portable consumer electronics, communication equipment, and automotive and industrial electronics. This device is mainly used in situations where the input voltage is several volts higher than the required maximum output voltage, such as when the battery voltage drops while the application device still demands a stable voltage, or when the circuit needs a lower voltage but theinput voltage is too high.

The AP131-15YL-13 operates by comparing the output voltage to a fixed reference voltage, internally generated. When the output voltage starts to drift, the AP131-15YL-13 immediately starts to adjust its own output voltage and defines a current value that is necessary to maintain the difference between the input and output voltages, ensuring that the output voltage remains stable.

The AP131-15YL-13 offers several features that make it a great choice for these applications. Its low quiescent current of 4µA and a maximum output current of 150mA coupled with its fast transient response make it capable of providing a stable voltage for applications where the current demand is constantly changing. The inherently low dissipation of the device is beneficial in applications where power efficiency is essential. Additionally, the remote sense capability compensates for voltage drops in the wiring, ensuring that the output voltage remains stable.

In summary, the AP131-15YL-13 is a three-pin adjustable LDO linear voltage regulator with a fixed output voltage of 1.5V. It offers a high output current of 150mA, a low quiescent current of 4µA, and a fast transient response. Its TO-252-2L surface mount package makes it suitable for space-sensitive applications. It can be used in a wide range of applications, such as portable consumer electronics, communication equipment, and automotive and industrial electronics. Its low drop-out voltage and remote sense capability ensure that the output voltage remains stable, even when the current demand is in flux.