AP7315-22SA-7

Overview

The AP7315-22SA-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 2.2V with a maximum guaranteed output current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio (PSRR) of 75dB at 1kHz, alongside low output noise of 60µVrms from 10Hz to 100kHz. Quiescent current is specified as low as 35µA. The component utilizes the SOT23 package and includes integrated enable control, thermal shutdown, and short-circuit protection.

Feature Summary

• CMOS-based architecture providing high output voltage accuracy and low on-resistance
• Integrated enable pin for precise power management and shutdown control
• High ripple rejection and ultra-low output noise suitable for sensitive RF subsystems
• Built-in fold-back short circuit current limiting and thermal protection

Applications

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

Procurement Notes

Verify that the ordering suffix SA corresponds to the SOT23 package configuration. Confirm the specific output voltage designation matches the required 2.2V level. Ensure compliance with RoHS directives and check for any automotive qualification requirements if operating in harsh environments. Validate that the non-discharge variant aligns with system standby current specifications.

Selection Notes

Select this component when designing low-power handheld equipment requiring stable regulation from lithium-ion batteries. The wide input voltage range supports full battery discharge cycles. Consider the low quiescent current for extended battery life applications. Verify PCB layout constraints regarding the small footprint and ensure adequate decoupling capacitors are placed near the VIN and VOUT pins for stability.

Part Context

This part belongs to the AP7315 series of low dropout regulators designed for portable electronics. The series offers various fixed output voltages ranging from 1.1V to 3.3V. It is distinguished by its high PSRR and low noise characteristics, making it ideal for noise-sensitive analog and RF sections in mobile devices. The manufacturer provides multiple package options including SOT23, SOT25, and X2-DFN1010-4.

Replacement Considerations

AP7315-22SR-7 serves as a direct functional substitute within the same series, differing only in the SOT23 package orientation or marking code.