AP7315-23SR-7

Overview

The AP7315-23SR-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.3V with a maximum guaranteed output current of 150mA. It operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio (PSRR) of 75dB at 1kHz and low output noise of 60µVrms from 10Hz to 100kHz. The device utilizes a CMOS process, includes an enable pin for shutdown control, and offers short-circuit protection. It is housed in a compact SOT23 package.

Feature Summary

• CMOS-based architecture delivering high output voltage accuracy and low quiescent current
• Integrated enable input allowing precise on/off control and low standby power consumption
• High ripple rejection and low output noise suitable for sensitive analog and RF circuits
• Built-in short-circuit protection to safeguard against overcurrent conditions

Applications

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

Procurement Notes

Verify the specific ordering suffix 'SR' corresponds to the SOT23 package variant when sourcing. Confirm that the required output voltage tolerance aligns with the standard ±1% specification provided in the datasheet. Ensure the application environment remains within the recommended operating temperature range of -40°C to +85°C. Check for any automotive qualification requirements if the end-use demands AEC-Q100 compliance, as this specific part number does not explicitly state such certification.

Selection Notes

Select this component when a stable 2.3V rail is needed for low-power portable electronics. The SOT23 package is ideal for space-constrained PCB layouts. Consider the 150mA current limit and dropout characteristics relative to the minimum input voltage. Verify that the external capacitor values meet stability requirements, specifically noting the need for low-ESR ceramic capacitors to ensure proper transient response and loop stability under varying load conditions.

Part Context

This device belongs to the AP7315 family of low dropout regulators designed for handheld communication equipment. The series offers various fixed output voltages ranging from 1.1V to 3.3V. The 'SR' suffix denotes the SOT23 package configuration, which provides a small footprint compared to other available options like SOT25 or X2-DFN1010-4. The family shares common electrical characteristics including high PSRR and low noise profiles.

Replacement Considerations

AP7315-23SA-7: Identical electrical specifications but packaged in SOT23 with different pinout orientation.

FAQ

Does the AP7315-23SR-7 include an internal discharge resistor?

No, the AP7315-23SR-7 is a non-discharge version. To utilize the auto-discharge feature, select the AP7315D-23SR-7 variant.

What is the recommended input capacitor value for stability?

A minimum 0.47μF ceramic capacitor is recommended between the VIN and GND pins to decouple input power supply glitches and ensure stability.