Hi,
I have a design where LM3880 is used to sequence a switching power supply. On a small percentage of units occasionally (about 5-10% of power-ups) EN1 and EN2 work as expected, but EN3 is asserted much later than expected. The delay is in the order of 10 seconds, up to 60 sec or so. Power is 5V, the EN pin is connected to a divider (10K to power, 5K to ground), pull-ups on ENx are 10K.
Has anyone seen anything like that?