I have a test circuit with the LTC2983CLX. The circuit is build as in the datasheet (Caps are placed as in the datasheet).
Grounds and VDD pins all are connected and supplied.
What I have measured: VDD=5,2V, LDO pin is at 2,5V. Reset input is at 5,2V. The Scope shows stable voltages with a ripple of about 100mV.
- Interrupt output stays at 0,75V (tried with no load and 2k2 pulled to ground) - SDO seems to be in High impedance state.
I don't know where else to look at...
I have two chips and both have the same behaviour...