AP7331-SNG-7

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The AP7331-SNG-7 is a fixed-output low dropout linear regulator manufactured by Diodes Incorporated. It provides a 300mA output current with a typical quiescent current of 65µA over the full load range. The device operates within an input voltage range of 2V to 6V and features a typical dropout voltage of 300mV at maximum load. It includes built-in current limit, short circuit, and thermal shutdown protections. The component is housed in a DFN2020-6 package and supports operation across an ambient temperature range of -40°C to 85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Very low quiescent current consumption for extended battery life in portable devices
• Fast transient response capability to handle rapid load changes without significant overshoot or undershoot
• Integrated protection mechanisms including current limiting, short circuit protection, and thermal shutdown

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• XDSL Routers
• Wireless LAN Cards
• Desktop and Notebook Computers
• Battery Powered Equipments

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify that the specific part number suffix matches the required output voltage and package type. Confirm RoHS compliance status and check for any recent Product Change Notifications (PCN) regarding manufacturing site or material updates. Ensure compatibility with standard surface mount assembly processes for the DFN2020-6 footprint.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this regulator when a stable 300mA supply is needed with minimal ground current draw. It is suitable for applications requiring fast start-up times and excellent line/load regulation. Verify that the input voltage remains within the specified 2V to 6V range and that the thermal dissipation requirements are met by the PCB layout.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the AP7331 series of low dropout regulators from Diodes Incorporated. The series offers both adjustable and fixed output options in SOT25 and DFN2020-6 packages. It is designed for low power applications where efficiency and small form factor are critical constraints.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other variants within the AP7331 family with different fixed output voltages or the adjustable version. Cross-referencing pinouts and electrical characteristics with competitors' LDOs is recommended if alternative sourcing is necessary.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the minimum output capacitance required for stability?

The AP7331 is stable with a minimum ceramic output capacitance of 1µF, provided it has an Equivalent Series Resistance (ESR) between 10mΩ and 200mΩ.

How does the enable pin function?

The EN pin turns the regulator on when set to a logic high level and turns it off when pulled low. If always-on operation is desired, the EN pin should be tied to the IN pin.