Product Details The AP7375Q-50SP is a fixed-output ultra-low-dropout linear voltage regulator designed to provide a regulated 5V supply for automotive and industrial electronic systems. It belongs to the AP7375Q family from Diodes Incorporated and is designed for applications requiring a wide input-voltage range, low quiescent current and dependable protection functions.The regulator accepts an input voltage from 3V to 45V and provides a fixed 5V output. The device supports up to 350mA output current, with the electrical specification defining a typical 300mA operating level. This makes the AP7375Q-50SP suitable for powering control circuits, sensors, communication interfaces and other low-power electronic loads from higher-voltage supply rails.A key feature of the AP7375Q series is its low quiescent current. The device has a typical ground current of approximately 2.1µA under the specified test condition, helping reduce power consumption in systems where the regulator remains active for extended periods.The AP7375Q-50SP includes an enable input for controlling the regulator output. The enable function can be used by a system controller to switch the regulated supply on or off according to operating conditions, helping designers implement power sequencing and low-power operating modes.Protection functions are integrated into the regulator to improve system reliability. The device includes current limiting, short-circuit protection and thermal shutdown. These features help protect the regulator and connected circuitry when abnormal load conditions or excessive junction temperature occur.The AP7375Q-50SP can operate across an ambient temperature range of -40°C to +125°C and is available in an 8-pin SO-8EP package with an exposed pad. The exposed-pad package can provide an effective thermal path to the PCB when the recommended layout and soldering design are followed.The regulator is particularly suited to automotive electronic designs because the AP7375Q family is specified for automotive applications and the AP7375Q-50SP-13 version is listed with AEC-Q100 qualification. Typical uses include vehicle control electronics, automotive communication systems, infotainment equipment and other electronic modules requiring a regulated 5V rail.For new designs, engineers should select input and output capacitors, PCB thermal design and operating conditions according to the manufacturer's specifications. The actual voltage drop and available output current depend on input voltage, load current and thermal conditions.