TPS7A14 is a small, ultra low-dropout regulator with excellent transient response and can provide sourcing current up to 1-A peak. Normally, key design performance of LDO includes high PSRR, low noise, low ripple, fast transient response, low quiescent at no load condition, good line and load regulation. And also, the stability is always necessary for LDO. TPS7A14 specifies these requirements superior and can be useful for the application of low input and low dropout power rails. It features NMOS pass element and fixed Vout so for optimized package and schematic size. This application note addresses the flexibility to adjustable Vout configuration and followed concerns on loop stability.