AMS1117 3.3V LDO Regulator Module

The Ams1117-Module3.3v is a compact DC-to-DC step-down regulator board built around the AMS1117-3.3 low-dropout (LDO) linear regulator. It accepts a DC input voltage from 4.5V to 7V and delivers a fixed 3.3V output with a maximum current of 800mA, making it suitable for powering microcontrollers, sensors, and communication modules that require a stable 3.3V rail. The AMS1117 chip provides a reference voltage accuracy of 1.5% and includes current limiting to protect the regulator and the downstream circuit from excessive load. The module is assembled using SMD technology with the regulator housed in a SOT-223 package, and the board includes mounting holes for secure attachment to a PCB or enclosure. Input and output connections are made through double-sided pins, and a red LED indicator shows when the board is powered. Typical applications include converting a 5V rail to 3.3V for digital logic, battery-powered portable devices, active SCSI terminators, notebook power management, and post-switching regulator stages. This LDO regulator module is a practical solution for electronics prototyping and low-power embedded designs that need a simple, reliable 3.3V supply.