AMS1117-5.0V Voltage Regulator – SMD

Product Description

The AMS1117-5.0V is a low-dropout LDO linear voltage regulator designed to provide a stable 5V DC output from a higher input voltage source.

This regulator can supply up to 1A output current depending on the specific manufacturer version, and it comes in a SOT-223 surface‑mount package. It features built‑in current limiting and thermal protection to safeguard the device during overload or overheating conditions. (Source: LCSC Electronics)

Features

• Fixed 5V DC output voltage
• Low-dropout linear regulator (LDO)
• Output current up to 1A
• SOT‑223 SMD package
• Built‑in current limiting
• Integrated thermal protection
• Three‑pin design
• Suitable for voltage regulation in electronic circuits

Technical Specifications

According to the AMS1117‑5.0 datasheet, the input voltage must be higher than the output voltage by a sufficient margin. The device is typically tested with input voltages between 6.5V and 12V, producing a nominal 5V output. (Source: alldatasheet.com)

Pin Configuration

• VIN – Input voltage
• VOUT – Regulated 5V output
• GND – Ground

Applications

• 5V voltage regulation in electronic circuits
• Power supply modules
• Arduino projects
• Embedded systems
• Digital control circuits
• Sensor and module powering
• Post‑regulation after switching power supplies
• DIY electronics projects

Important Note

Since the AMS1117‑5.0 is a linear regulator, the voltage difference between input and output is dissipated as heat. When operating at higher currents, proper heat dissipation is required—such as using adequate copper area on the PCB or adding a heatsink.

Also, AMS1117‑5.0 is not a switching DC‑DC converter, so its efficiency is lower when the input voltage is significantly higher than 5V.