I built the Circuit described in the Designnote from Zetex and used the Boardlayout posted on CPF but it doesn't work as it should! It works fine when the Inputvoltage is below 1V (0.9V) but over 1V the output is off and the Circuit draws more and more current with increasing Voltage! At 2 V it draws about 1 A from my Power Supply but the Output is 0V.
I've checked every connection and tested all parts (except the ZXSC310)
BTW I use the ZXSC310 and drilled a hole in the Board where the shutdownpin is! The Datasheet from the ZXSC310 says that its enabled when the STDN-Pin is open or pulled high! I also tried to connect the STDN-Pin to V+ but that doesn't change anything! Please help me I don't know why this thing doesn't work!