Hello,
into my project I applied circuit with TPS61202 to increase voltage from 3.7V (LiPo battery) to 5V. I have a following problem: when device starts up with EN pin pulled high it works, but when during work EN pin is pulled down (5V output goes off) and next again pull it high it doesn't work and I'm not able to do any 'reset'. Sometimes when I discharge capacitor on Vaux (there is about 4,2V on it) it's starting to work but not always.. Do you have any ideas? My circuit is the same as in the datasheet, and FB is connected to Vout. I was testing it with LED, output current about 5mA. EN and PS pins are pulled-up to 3V and connected to uC which is being run on 3V from regulator.
Regards,
Adrian