AMS1117-ADJ in AMS1117 LDO Family
The AMS1117-ADJ is an adjustable low dropout (LDO) linear regulator sub-family designed to provide up to 1A of output current. Manufactured by several vendors including Diodes Incorporated and Advanced Monolithic Systems, this component is a staple in power management for converting higher DC voltages down to a user-defined level between 1.25V and 13.8V using an external resistor divider. It is specifically favored for its simplicity, thermal stability, and low cost in high-volume production environments.
Variants in This Sub-Family
Variants within the AMS1117-ADJ sub-family primarily differ by package type and operating temperature range. The most ubiquitous package is the SOT-223 for surface-mount applications, though TO-252 (DPAK) versions exist for better thermal dissipation. Individual manufacturer part numbers may also specify different voltage tolerances (typically 1% or 2%) and varying stability requirements regarding the Equivalent Series Resistance (ESR) of the output decoupling capacitors.
