AMS1117-3.3S

Overview

The EVVO AMS1117-3.3S is a positive low dropout voltage regulator providing a fixed 3.3V output with a maximum current of 1A. It operates within an input voltage range up to 18V and features a typical dropout voltage of 1.2V at full load. The device includes thermal shutdown and current limiting protection, ensuring stability under overload conditions. Designed for surface-mount applications, it utilizes the SOT-89-3L package configuration.

Feature Summary

• Fixed 3.3V output with less than 1.5% tolerance
• Integrated thermal shutdown and current limiting
• Low dropout operation down to 1V differential

Applications

• Battery chargers
• Cellular phones
• Cordless telephones
• Portable instrumentation
• SMPS post-regulators

Procurement Notes

Verify that the ordering suffix 'S' corresponds specifically to the SOT-89-3L package as defined in the manufacturer's nomenclature. Confirm compliance with RoHS standards and ensure the supplier provides the official datasheet for the specific manufacturing lot to validate electrical characteristics and pinout alignment.

Selection Notes

Select this component when a stable 3.3V rail is required from higher input voltages with moderate current demands. Ensure adequate heat dissipation is designed into the PCB layout, as power dissipation is internally limited and dependent on ambient temperature and thermal resistance values associated with the SOT-89-3L package.

Part Context

This part belongs to the AMS1117 series of adjustable and fixed voltage regulators. The series is designed to provide 1A output current while operating with minimal input-to-output differential voltage. It is pin-compatible with other three-terminal SCSI regulators and is available in multiple surface-mount packages including SOT-223-3L, TO-252-2L, and SOT-89-3L.

Replacement Considerations

Compatible substitutes include AMS1117-3.3CD (TO-252-2L) and AMS1117-3.3CS (SOT-223-3L). Verify package dimensions and pinout compatibility before substitution.