AP1118S15L-13

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AP1118S15L-13 Application Field and Working Principle

Linear voltage regulators play a critical role in ensuring the safety and stability of electronic equipment, especially in computer peripherals, automotive electronics and industrial control systems. The AP1118S15L-13 is a small size, low dropout voltage regulator with a low operating current.It supports up to 1000mA load current and operates within an input voltage range from 2.9V to 18V. It has built-in over-temperature, over-current and over-voltage protection, making it an ideal choice for a wide range of power systems.

Application Field

The AP1118S15L-13 is designed for applications such as motor driver, LED lighting, battery charger, LCD display and WiFi/Bluetooth systems. Its high output current and high accuracy make it suitable for a wide range of applications. It meets the requirements of European EMC standard and is compliant with RoHS standards.

Working Principle

The AP1118S15L-13 is a high-performance low dropout voltage regulator. It is composed of an error amplifier, multiple current paths and an over-temperature protection circuit. The error amplifier adjusts the output voltage according to the feedback voltage. For stable operation, the error amplifier should have sufficient loop gain and loop phase margin. Therefore, the internal tolerance should be kept as low as possible. The AP1118S15L-13 has an ultra-low tolerance of ±1%. It has auto-discharge and enable pins, which reduce the power consumption and enable dimming functions. The enable pin also has a UVLO (under voltage lockout) function. When the enable is low and the input voltage is lower than the UVLO voltage, the output voltage is turned off. The IC also includes a current limited protection circuit, which limits the output current to 1.5A.

The AP1118S15L-13 features a fast transient response, making it suitable for use in dynamic load applications. It uses a low ESR diamond shaped inductor to ensure a fast transient response. It also has better temperature characteristics and provides efficient energy transfer in a range of temperatures from -40℃ to 125℃. The AP1118S15L-13 also provides multiple output voltage options and can be used to regulate multiple outputs within 0.1V accuracy. It is typically used to regulate a range of 0.8V to 5V.

In conclusion, the AP1118S15L-13 is an ideal solution for a wide range of power systems and is suitable for use in motor drivers, LED lighting, battery chargers, LCD displays and Wifi/Bluetooth systems. Its fast transient response and low tolerance make it an ideal choice for dynamic load applications. Moreover, its low ESR inductor and temperature characteristics offer efficient energy transfer and protection over a wide range of temperatures.

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