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The AP7315D-135FS4-7B is a low dropout regulator manufactured by Diodes Incorporated, featuring an integrated auto-discharge circuit. It provides a fixed output voltage of 1.35V with a maximum output current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and supports an ambient operating temperature from -40°C to +85°C. Packaged in an X2-DFN1010-4 footprint, it offers high ripple rejection of 75dB at 1kHz and low output noise of 60µVrms.
Verify the specific 'D' suffix indicates the inclusion of the internal discharge feature, as standard versions lack this function. Confirm the FS4 package code corresponds to the X2-DFN1010-4 form factor required for your PCB layout. Ensure the ordering suffix matches the manufacturer's tape and reel specifications for automated assembly processes.
Select this variant when system shutdown requirements mandate fast output capacitor discharge without external components. Compare against non-discharge versions if continuous standby current consumption must be minimized during inactive states. Verify that the 1.35V fixed output aligns precisely with downstream load requirements before finalizing the design.
This component belongs to the AP7315 series of low dropout regulators designed for handheld communication equipment. The series utilizes a CMOS process to achieve low power consumption and robust line and load transient response characteristics across various fixed voltage options.
AP7315-135FS4-7B (Non-discharge version)
The 'D' suffix denotes that the regulator includes an integrated auto-discharge circuit, which actively pulls down the output voltage when the enable pin is disabled.
Driving the EN pin high turns the regulator on, while pulling it low disables the output and activates the internal discharge resistor to rapidly reduce the output voltage.