AP7315D-12W5-7

Overview

The AP7315D-12W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.2V with a guaranteed maximum load 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 alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power control and includes an internal auto-discharge circuit that activates when disabled. Packaged in SOT-25-5, it supports an operating ambient temperature range from -40°C to +85°C.

Feature Summary

• Integrated CMOS-based voltage reference and error amplifier with built-in resistor network for precise fixed output voltage delivery.
• Features an enable input pin allowing the regulator to be turned on or off, facilitating system power management.
• Includes an internal N-channel auto-discharge mechanism that actively pulls down the output voltage when the device is disabled.
• Provides short-circuit protection that clamps the output current to approximately 60mA during fault conditions.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and discharge functionality. Confirm RoHS compliance status and environmental declarations directly with the manufacturer. Ensure the selected variant matches the required output voltage accuracy grade. Validate that the intended application environment falls within the specified operating temperature limits.

Selection Notes

Select this component when a compact footprint and low quiescent current are required for portable electronics. The integrated discharge feature distinguishes it from non-discharge variants, making it suitable for applications requiring rapid output voltage decay. Consider the SOT-25 package dimensions for PCB layout constraints. Evaluate thermal dissipation requirements based on the maximum power dissipation rating under expected load conditions.

Part Context

This part belongs to the AP7315 series of low dropout regulators designed for low power handheld communication equipment. The 'D' suffix indicates the inclusion of an output discharge function, while 'W5' specifies the SOT-25 package. The series offers various fixed output voltages ranging from 1.1V to 3.3V, catering to diverse digital logic and analog circuit supply needs.

Replacement Considerations

AP7315-12W5-7

FAQ

What is the function of the EN pin?

The EN pin serves as an enable input. Driving it high turns the regulator on, while pulling it low puts the device into shutdown mode. It must not be left floating.

How does the AP7315D differ from the standard AP7315?

The AP7315D variant includes an internal auto-discharge circuit that actively discharges the output capacitor when the device is disabled, whereas the standard AP7315 does not have this feature.

What is the typical ripple rejection performance?

The device provides a typical ripple rejection (PSRR) of 75dB at a frequency of 1kHz under standard test conditions.