ADP1108AN-3.3

Overview

The ADP1108AN-3.3 is a fixed-output linear voltage regulator manufactured by Analog Devices Inc., belonging to the LT1108 series of low-dropout (LDO) regulators. It provides a stable 3.3 V output with a maximum continuous current capability of 300 mA. The device is housed in an 8-pin SOIC package and is designed for surface-mount installation. It operates within an input voltage range extending up to 6 V, ensuring efficient regulation while maintaining a low quiescent current consumption of approximately 90 µA. The component supports operation across a standard commercial temperature range from 0°C to +70°C.

Feature Summary

• Provides a fixed 3.3 V regulated output suitable for digital logic power supplies
• Features low dropout voltage characteristics for efficient power conversion
• Includes internal protection mechanisms against overcurrent and thermal overload

Applications

• Powering microcontrollers and embedded processors requiring 3.3 V rails
• Supplying analog-to-digital converters and signal conditioning circuits
• Battery-powered portable devices needing efficient linear regulation

Procurement Notes

Verify the specific suffix AN-3.3 to confirm the fixed 3.3 V output variant and SOIC-8 package configuration. Ensure compatibility with the target PCB footprint and thermal requirements. Confirm RoHS compliance status through official manufacturer documentation prior to integration into production designs.

Selection Notes

Select this component when a fixed 3.3 V output is required with moderate load currents up to 300 mA. It is appropriate for applications where noise sensitivity is lower than that of switching regulators but efficiency is still a consideration. Verify that the input voltage remains sufficiently above the dropout threshold to maintain regulation under all operating conditions.

Part Context

This part belongs to the LT1108 family of low-dropout linear regulators produced by Analog Devices. The family offers various fixed output voltages and current ratings. The ADP1108AN-3.3 specifically denotes the 3.3 V fixed version in the SOIC-8 package, distinguishing it from adjustable variants or other package options within the same functional family.

Replacement Considerations

Cross-reference with other 3.3 V LDOs offering similar 300 mA output current and SOIC-8 packaging. Verify pinout compatibility and electrical specifications such as dropout voltage and quiescent current before substitution.