Hello,
we want to sequence several LMZ31xxx (LMZ31503, LMZ31506 and LMZ31520) simple switcher power modules. In the LMZ31xxx datasheets it is mentioned to use a external MOSFET to control the INH pin. Is it possible to use the UCD90xxx GPIO (configured as open-drain) directly to drive the INH pin? On a Xilinx Eval Board i have seen this configuration using an additional pull-down resistor to limit the voltage on the INH pin to ~3.6V (see attached schematic). My question is if this circuit is valid when using the above mentioned simple switcher modules together with the UCD9090? This would allow the saving of several external MOSFETs...
Best regards,
Julian