JAJSH39A March 2019 – June 2019 LM66100
PRODUCTION DATA.
Similar to the Dual Ideal Diode circuit, the Status Output can also be used to control a discrete P-Channel MOSFET. This can be useful in applications that want to minimize the leakage current on the secondary supply, such as battery backup systems. This configuration can also be used on systems that require a lower RON on the secondary rail, useful for higher current applications.
When the Ideal Diode path is enabled, the status will be Hi-Z and pull up the gate of the external PFET to keep it off. When the main supply (VIN1) drops such that backup supply (VIN2) is higher than VIN1, the ideal diode will be disabled and pull the ST pin and the PFET gate low to turn on the discrete MOSFET path.