Simulation of LOAD TRANSIENT ANALYSIS OF LDO

[ahmadiit]

lt spice simulating ldo

hi, i want to simulate the load transient analysis of LDO regulator in LTSPICE.
so i need to change output load values and need to do .tran analyisis and plot vo(t).
Could you please tell me how to vary load resistance and how to simulate load transient response.
thanks you

 

[erikl]

ltspice sweep transient

I don't know LTSPICE, but with other SPICE programs you assign a variable to the load resistor (or to the load current), and then run a DC sim. with a sweep of this variable.
Should also be possible with a transient sim.

 

[rock_zhu]

ltspice simulate load transient

I usually add a PWL current source as load. then do .tran

 

[max0412]

ads simulate ldo

You can use a pulsed current source where you can set the rise time.If LTSpice doesn't have that just test it how you would test it on the bench.Use a mosfet to switch a load in and out.

Regulator output

Fet on full load Fet off no load .