I'm planning to use LTC4412 as a user controllable MOSFET switch. I'll post a image of my schematic for better clarity.
The range of Vin will be from 2.85-4.35V and I've used an SPDT slide switch with a minimum contact current of 1uA. It will be used to turn on and off the IC through the CONTROL pin. I'm planning to use SI9433BDY-T1-E3 as the P-channel MOSFET. I've done the simulation on LT Spice and observed only around a 13mV drain-source drop. Would like to get a confirmation whether this MOSFET is the right choice?
Finally, I would like to attach an LED on the STAT pin in such a way that whenever the switch is closed, the LED should glow. If I use LTST-C193KRKT-5A, how much resistance would I have to pull-up/down the LED to?
Thanks in Advance
Hi Vmenon, Because you did not specify the load current, I’ll read between the lines:
Because the sense pin is grounded, there is no voltage regulation across the PFET, and it should act as a switch…
Vmenon, Reading the pin description of CTL, it says an internal current sink will pull CTL low if the pin is floating, so you can omit the 10k pull-down. -Aaron