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Renesas Electronics Europe - Knowledgebase

What voltage to use if voltage of OUTPUT pin is higher than the INPUT pin?

Latest Updated:09/01/2006


What withstanding voltage of a reverse current protection diode (which passes current flowing from the OUTPUT to INPUT) should I use when the voltage of the OUTPUT pin of my 3-terminal regulator (for a positive power supply) becomes higher than the INPUT pin's voltage?


The withstanding voltage of the diode in this case must be higher (at least 1.2 to 1.3 times higher) than the absolute maximum rating of the 3-terminal regulator IC's input voltage.

Example: uPC29xxB series
Suitable Products
3 Terminal Regulators