The Bay Linear B1129 is a 1 Amp high accuracy, low dropout voltage regulator with only 40mV at light loads and 450mV(Typ.)@ 1.0A) and low quiescent current of 240A typical. The B1129 is designed for low voltage a application that requires lower dropout voltage and faster transient response. This device is an excellent choice for use in powering low voltage applications where require a lower dropout, faster transient response and as a post regulator for switching supplies applications. The B1129 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The B1129-xx devices are in 3 pin fixed voltage regulators. The B1129 include an Enable pin in the 5 pin packages. The B1129are offered in a 3 & 5-pin SOT-223 & TO-263 package compatible with other 3 terminal regulators. .