Hello,
The circuit will work from 2.5 to 5.5 Volts reading the datasheet posted by @ScottWang , who did do an amzing research.
Bertus
The diode is in reverse connection and possibly ment as reverse voltage protection.However!! never seen all this running from 0.6v before... Its the only fly in the ointment!!
The circuit will work from 2.5 to 5.5 Volts reading the datasheet posted by @ScottWang , who did do an amzing research.
Bertus