AMS1117-1.2

Overview

The UMW AMS1117CD-1.2 is a positive low dropout linear regulator providing a fixed 1.2V output with a maximum current of 1A. It operates within an input voltage range up to 18V and maintains stability across a junction temperature range of -40°C to +125°C. The device features a typical dropout voltage of 1.2V at full load, ensuring efficient power management in low differential applications. Output accuracy is specified at ±2% for the 1.2V variant. Integrated protection mechanisms include thermal shutdown and current limiting to safeguard against overload conditions.

Feature Summary

• Fixed 1.2V output with ±2% tolerance
• Integrated thermal shutdown and current limiting
• Low dropout voltage operation
• Surface mount package design

Applications

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

Procurement Notes

Verify the specific suffix 'CD' corresponds to the TO-252-2L package configuration as defined in the manufacturer's nomenclature. Confirm that the component meets RoHS3 compliance standards required for your assembly process. Ensure input capacitors are selected according to datasheet recommendations to maintain loop stability under varying load conditions.

Selection Notes

Select this component when a stable 1.2V rail is required for digital logic or sensor interfaces. The TO-252-2L package offers improved thermal dissipation compared to smaller footprints, suitable for higher ambient temperatures. Verify that the input voltage does not exceed the 18V absolute maximum rating during transient events.

Part Context

This device belongs to the AMS1117 series of three-terminal LDO regulators designed for general-purpose power management. The series includes various fixed voltage options and adjustable versions. The AMS1117CD-1.2 specifically denotes the 1.2V fixed output variant housed in the TO-252-2L plastic package, manufactured by UMW.

Replacement Considerations

Compatible replacements include other AMS1117 variants from different manufacturers offering identical pinouts and electrical characteristics. Ensure substitute parts support the TO-252-2L footprint and provide equivalent thermal resistance values for reliable heat dissipation in the target application.