When S7V8F3 is in shutdown mode, SHDN pin tied to ground, what is the expected voltage level on the output pin?
The reason I ask, is that I have a single cell lipo 4.2 V as my power source.
When the regulator is active, I read 3.3 V on the output, but when the regulator is shutdown, I read 1.2V on the output?
I would expect this to be 0 V, especially if the “Load is disconnected from the input”, as stated in the datasheet.
The device is put into operation when EN is set high. It is put into a shutdown mode when EN is set to GND. In shutdown mode, the regulator stops switching, all internal control circuitry is switched off, and the load is disconnected from the input. This means that the output voltage can drop below the input voltage during shutdown. During start-up of the converter, the duty cycle and the peak current are limited in order to avoid high peak currents flowing from the input.