As usual, Audio is making a mountain out of a Molehill.
That's hard to tell. I'm usually the main culprit in do that.
ps: while the circuit I posted does what you asked for back in post #1
I'm not sure that circuit does.
From the post prior to your simulation:
-To fully power down the unit:
*EN must be connected to GND for the unit to be powered down
*LiPo power to the unit must be open circuit
Or in table format:
Switch--Switch Out/Vg--EN
OPEN----"Floating"--0V
CLOSED--LipoV-----Vbat
In your simulation, when Vout =0V, then EN should be 0V.
I read some of the on-line discussion about the "powerBoost", and I don't think you understand how it works.
In what regard? I have reviewed, tested, and commented on that very post using the module I have in hand. (I have other issues with the LBO, but that is a different story for a different forum)
The module has six pins: (original long version here
Module Pinout and Functions)
Summary version:
USB - this is the micro USB 5V power pin. Power from the microUSB port when it is plugged in
BAT - this is the battery input, connected directly to the JST connector. For most Lithium batteries, this will range from 3.0V when near-dead to 4.2V when fully-charged.
VS - this is a switched output, either USB when connected or battery power when not connected to USB.
GND - this is the power ground. This boost converter is not 'isolated' - the ground input is the same as the ground output
5V - this is the boosted output. \
EN - this is the 'enable' pin. By default it is pulled 'high' to VS (according tot he schematic it is pulled to battery?). To turn off the booster, connect this pin to ground.
LBO - Low Battery Output. By default it is pulled high to BAT but when the charger detects a low voltage (under 3.2V) the pin will drop down to 0V.
To minimize losses due to regulation, part of the unit runs from VS (Vshared) and the sensor runs from the boosted 5V. To turn the circuit off, but still be able to charge the battery, there needs to be a disconnect between VS and the load. The same does not (completely) apply to 5V. I can turn off the sensor by disconnecting 5V from the sensor, but the booster still runs and draws current. To stop the boost circuit, EN is connected to GND. In short that
is how the module works.