AP7315-31FS4-7B

Overview

The AP7315-31FS4-7B is a low dropout regulator manufactured by Diodes Incorporated, featuring a fixed output voltage of 3.1V and an X2-DFN1010-4 package. It guarantees an output current of 150mA with a wide input voltage range from 1.7V to 5.25V. The device provides high ripple rejection of 75dB at 1kHz and maintains low output noise of 60µVrms across the 10Hz to 100kHz bandwidth. Quiescent current is specified as low as 35µA, and it includes an enable pin for power control.

Feature Summary

• CMOS-based architecture providing high output voltage accuracy and low on-resistance
• Integrated enable pin allowing precise power management and shutdown capabilities
• Built-in short circuit protection to safeguard against overcurrent conditions
• RoHS compliant construction utilizing halogen-free and antimony-free materials

Applications

• Smart Phone/PAD
• RF Supply
• Cameras
• Portable Videos
• Wireless Communication

Procurement Notes

Verify the specific ordering suffix FS4-7B corresponds to the required X2-DFN1010-4 package and tape-and-reel quantity. Confirm that the non-discharge variant matches system requirements, as discharge versions exist within the same family. Ensure compatibility with standard surface-mount assembly processes for the specified footprint dimensions.

Selection Notes

Select this component when a stable 3.1V rail is needed for noise-sensitive circuits like RF subsystems. The X2-DFN1010-4 package offers minimal PCB area consumption suitable for dense layouts. Consider the 150mA current limit and 75dB PSRR for applications requiring clean power delivery under varying load conditions.

Part Context

This part belongs to the AP7315 series of low dropout regulators designed for handheld communication equipment. The series emphasizes low power consumption and fast transient response. The AP7315-31FS4-7B specifically utilizes the compact DFN package to support modern portable device form factors while maintaining electrical performance standards.

Replacement Considerations

AP7315D-31FS4-7B serves as a functional substitute if output discharge capability is required instead of the non-discharge configuration provided by this part number.