AMS1117-1.8 SOT-89

Overview

The AMS1117-1.8 SOT-89 is a positive fixed-output linear regulator manufactured by Shenzhen Slkormicro Semicon Co., Ltd. It provides a nominal output voltage of 1.8V with a maximum continuous output current of 1A. The device features a maximum dropout voltage of 1.3V at full load and supports a maximum input voltage of 18V. Key electrical parameters include a static current (Iq) of approximately 2mA to 3mA, depending on specific test conditions. The component operates within a junction temperature range up to 150°C and utilizes the SOT-89 surface-mount package.

Feature Summary

• Provides stable 1.8V fixed output voltage with high precision
• Supports up to 1A continuous load current capability
• Integrates internal thermal shutdown and current limiting protection circuits

Applications

• Power supply for microcontrollers and embedded systems
• Voltage regulation for sensor modules
• Post-regulation for switching power supplies

Procurement Notes

Verify the manufacturer designation as Shenzhen Slkormicro Semicon Co., Ltd. during sourcing. Confirm the package type is strictly SOT-89, as other variants exist in the series. Ensure the output voltage specification matches the required 1.8V fixed level. Cross-reference datasheets for exact thermal resistance values relevant to your PCB layout.

Selection Notes

Select this component when a fixed 1.8V rail is required with moderate current demands up to 1A. Consider the SOT-89 package for its balance of thermal performance and board space efficiency compared to smaller packages. Evaluate the input-to-output voltage differential to ensure it remains within the specified dropout limits under all operating conditions.

Part Context

This part belongs to the AMS1117 series of low-dropout linear regulators. The series is widely used for general-purpose voltage regulation in portable and industrial electronics. The SOT-89 variant offers improved thermal dissipation over smaller packages like SOT-223, making it suitable for applications requiring sustained 1A loads without excessive heat sinking.

Replacement Considerations

Compatible replacements include AMS1117-1.8 from other manufacturers such as MSKSEMI or JSMSEMI, provided they adhere to the same pinout and electrical specifications. Verify that substitute parts support the SOT-89 package and maintain equivalent thermal and current ratings.