Hello and thank you always for your help.
Apparently I made I mistake and posted a question on the homework forum, which was not homework. I am trying to correct my mistake by putting the question here. My deepest apologies.
I have a question related with LDO regulators . Please take a look at these circuits:
Can someone explain me these circuits, and specially the part that I marked with a black elipse??
The IC being used is
http://www.torexsemi.com/products/discon/item/53-XC6209_12.pdf
I understand that CE is some kind of a enable pin. The datasheet actually provides the left circuit as a "typical application circuit".
But regarding the right circuit, I suppose VCC-3V3 refers to a 3.3V so what happens if I put another voltage to BL_CTRL?? what happens if I put GND there? and what happens if I apply a PWM signal there??
I understand voltage dividers when they go from VCC to ground so I guess R8 and R9 are somehow dividing the voltage, but ok, if this is so, then what happens when this divided voltage enters CE???
My understanding so far is tha CE enables or disables the function of this circuit but I guess that would be with a 5V or GND signal. What I have absolutely no idea and I cant't even guess is what happens with lower voltages or with a PWM signal there and why do they put a voltage divider there...
Any help will be greatly appreciated
Thanks in advance
Apparently I made I mistake and posted a question on the homework forum, which was not homework. I am trying to correct my mistake by putting the question here. My deepest apologies.
I have a question related with LDO regulators . Please take a look at these circuits:
Can someone explain me these circuits, and specially the part that I marked with a black elipse??
The IC being used is
http://www.torexsemi.com/products/discon/item/53-XC6209_12.pdf
I understand that CE is some kind of a enable pin. The datasheet actually provides the left circuit as a "typical application circuit".
But regarding the right circuit, I suppose VCC-3V3 refers to a 3.3V so what happens if I put another voltage to BL_CTRL?? what happens if I put GND there? and what happens if I apply a PWM signal there??
I understand voltage dividers when they go from VCC to ground so I guess R8 and R9 are somehow dividing the voltage, but ok, if this is so, then what happens when this divided voltage enters CE???
My understanding so far is tha CE enables or disables the function of this circuit but I guess that would be with a 5V or GND signal. What I have absolutely no idea and I cant't even guess is what happens with lower voltages or with a PWM signal there and why do they put a voltage divider there...
Any help will be greatly appreciated
Thanks in advance
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