PRE-REGULATOR WITH REVERSE CURRENT BLOCKING

摘要

An apparatus (10) includes a blocking N-channel MOS (LDMOS) transistor (34) that prevents current flow when the supply connection VDD is reversed. When connected properly, the body diode of transistor (34) conducts to provide a start-up function. A bias generator (14) is employed to enable the low drop-out voltage function, allowing the output voltage to be very close to supply.