AP7315-33FS4-7B

Overview

The AP7315-33FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a stable 3.3V output with a guaranteed maximum load current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and maintains high accuracy of ±1%. Key electrical characteristics include a quiescent current as low as 35µA, ripple rejection of 75dB at 1kHz, and low output noise of 60µVrms from 10Hz to 100kHz. It features an enable pin for power control and is housed in an X2-DFN1010-4 package.

Feature Summary

• Integrated enable input allows precise power management and shutdown control
• High ripple rejection ratio ensures clean power delivery for sensitive circuits
• Low output noise minimizes interference in RF and audio subsystems
• Built-in short circuit protection safeguards against overcurrent conditions

Applications

• Smartphones and tablet devices
• RF supply modules
• Portable video players
• Wireless communication adapters
• Cameras and portable media players

Procurement Notes

Verify the specific ordering suffix FS4-7B to confirm the X2-DFN1010-4 package and tape-and-reel packaging quantity. Ensure the 'D' designation is absent to confirm the non-discharge output variant. Cross-reference the manufacturer part number with official Diodes Incorporated documentation to validate RoHS compliance and lead-free status before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.3V rail is required with minimal footprint constraints due to the compact X2-DFN1010-4 package. It is suitable for battery-powered applications requiring low quiescent current and high PSRR. Verify that the input voltage remains within the 1.7V to 5.25V range and that the thermal dissipation requirements are met by the PCB layout copper area.

Part Context

This device belongs to the AP7315 series of CMOS low dropout regulators designed for handheld communication equipment. It utilizes an integrated resistor network for fixed output voltages ranging from 1.1V to 3.3V. The series supports dense PCB layouts through multiple package options including SOT23, SOT25, and X2-DFN1010-4, catering to space-constrained portable electronics designs.

Replacement Considerations

Consult the official datasheet for direct cross-references. Variants such as AP7315D-33FS4-7B offer auto-discharge functionality instead of non-discharge.