i have a problem with my adjustable voltage regulator (see attached circuit).
i have a load that needs 5.5V and around 2.4A.
im using an adjustable voltage regulator LM1084.
without load,
vin=12V
vo=5.5V
with load,
vin=11.72
vo=4.368
I_load=1.87A
my expectation is that with or without load, the Vo=5.5V.
any idea why this happened?
also note that the Voltage Supply input changed from 12V to 11.7..
Your voltage supply has some resistance. Right click on it. Maybe R=.1 ohm
What is the "IN" voltage to your LM1084? I think the MOSFET is dropping the voltage.
Your voltage supply has some resistance. Right click on it. Maybe R=.1 ohm
What is the "IN" voltage to your LM1084? I think the MOSFET is dropping the voltage.
It says in the datasheet "Power dissipation is kept in a safe range by current limiting circuitry. Refer to Overload Recovery in Application Notes."
I don't know how simulator could "simulate" this. Are you having trouble with the simulator or a real circuit? Anyway, the regulator is dissipating ~13W of power.
It says in the datasheet "Power dissipation is kept in a safe range by current limiting circuitry. Refer to Overload Recovery in Application Notes."
I don't know how simulator could "simulate" this. Are you having trouble with the simulator or a real circuit? Anyway, the regulator is dissipating ~13W of power.
this is a real circuit. i just used a supply resistance of R=0.1ohm to simulate tha actual 11.72V drop at the power supply.
but other than that, those values are from the real circuit.
i already tried lower current load so as not to overload it but i find it not regulating anymore.. probably a damaged one?