2.9V Low – Dropout (LDO) Voltage Regulator

The WEA3629LD45G is a high voltage ultra-low power Regulator designed for 5G mobile phones. It integrates PowerGood and Current limit functions and operates from 3.6V unregulated supply down to 3.0V and offers voltage feedback amplifier (series – shunt) which active part is comprised of a telescopic cascode amplifier stage, followed by a PMOS pass – device which operates in saturation as a common source stage. The Current Limit Protection circuit detects an output current higher than the prescribed value and the Power Good circuit detects when the output voltage of the LDO is within a certain range, in which the output is considered valid. Results validate a 2.9V output voltage from a 3.1 V to 3.6 V input voltage with a current dissipation of 5uA.