* Z:\tmp\asc_mix_bvbm4pog\mix_365.asc
* Generated by LTspice 26.0.1 for Windows.
V1 IN 0 5
L1 N001 OUT 1
Rload OUT 0 4
C1 OUT 0 10 V=4 Irms=8.88 Rser=0.00522854 Lser=0 mfg="KEMET" pn="C0805C106K7PAC" type="X5R"
XU1 IN IN N001 OUT 0 ADP2109-x.x Rtop=112K ;pnba Vin)EN)SW)FB)GND
Vgs Vg 0 {VGS} AC 1
Vds Vd 0 {VDS}
M1 Vd Vg 0 0 BSS83
.model NMOS NMOS
.model PMOS PMOS
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.mos
.tran .5m startup
.STEP PARAM VGS 0 5 .01
.OP
* Plot transconductance Gm as Id(M1) or I(Vds) to get Gm at 1Hz.
* Forward Conductance "Gm" Versus Gate Source Voltage at 1Hz\n \nPlot Id(M1) to get Gm versus Vgs. \nThe .AC command perfforms a small signal analysis and thus Id(M1)\nis the transconductance Gm.
* Gerneral hint for plots:\nMake the plot window active. \n"PlotSettings->Add Trace" and select an item\nor "right mouse button ->Add Trace" and select an item.
.param VDS=5
* Model from Philips Semiconductor
.MODEL BSS83 NMOS
+ LEVEL=3
+ W=1E-3
+ L=1E-6
+ VTO=2
+ VMAX=1E6
+ RS=3
+ RD=3
+ CJ=0.001396
+ MJ=0.3936
+ THETA=1E-6
+ ETA=0.009307
+ KAPPA=2.226
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\ADP2109-1.2.asy)
.lib ADP2109-x.x.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 1728 848
WIRE 192 144 96 144
WIRE 208 144 192 144
WIRE 528 144 496 144
WIRE 640 144 608 144
WIRE 720 144 640 144
WIRE 800 144 720 144
WIRE 96 160 96 144
WIRE 720 160 720 144
WIRE 800 160 800 144
WIRE 96 256 96 240
WIRE 720 256 720 224
WIRE 800 256 800 240
WIRE 192 304 192 144
WIRE 208 304 192 304
WIRE 640 304 640 144
WIRE 640 304 496 304
WIRE 352 384 352 368
WIRE 1184 320 1184 272
WIRE 1376 432 1376 608
WIRE 1376 608 1184 608
WIRE 1184 464 1184 416
WIRE 1184 544 1184 608
WIRE 1184 640 1184 608
WIRE 1184 192 1184 144
WIRE 1328 416 1184 416
WIRE 1184 144 1376 144
WIRE 1376 144 1376 336
SYMBOL VOLTAGE 96 144 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL ind 512 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL RES 784 144 R0
SYMATTR InstName Rload
SYMATTR Value 4
SYMBOL cap 704 160 R0
SYMATTR InstName C1
SYMATTR Value 10
SYMATTR SpiceLine V=4 Irms=8.88 Rser=0.00522854 Lser=0 mfg="KEMET" pn="C0805C106K7PAC" type="X5R"
SYMBOL ADP2109-1.2 352 224 R0
SYMATTR InstName U1
SYMBOL voltage 1184 448 R0
WINDOW 123 24 132 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC 1
SYMATTR InstName Vgs
SYMATTR Value {VGS}
SYMBOL voltage 1184 176 R0
WINDOW 123 24 132 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vds
SYMATTR Value {VDS}
SYMBOL nmos 1328 336 R0
SYMATTR InstName M1
SYMATTR Value BSS83
FLAG 96 256 0
FLAG 352 384 0
FLAG 720 256 0
FLAG 800 256 0
FLAG 800 144 OUT
FLAG 96 144 IN
FLAG 1184 640 0
FLAG 1184 320 0
FLAG 1184 144 Vd
FLAG 1184 416 Vg
TEXT 552 352 Left 2 !.tran .5m startup
TEXT -112 -224 Left 0 !.STEP PARAM  VGS 0 5 .01
TEXT -112 -184 Left 0 !.OP
TEXT -112 -136 Left 0 !.AC LIST 1
TEXT 48 -136 Left 0 ;Plot transconductance Gm as Id(M1) or I(Vds) to get Gm at 1Hz.
TEXT -112 -416 Left 0 ;Forward Conductance "Gm" Versus Gate Source Voltage at 1Hz\n \nPlot Id(M1) to get Gm versus Vgs.  \nThe .AC command perfforms a small signal analysis and thus Id(M1)\nis the transconductance Gm.
TEXT -104 -40 Left 0 ;Gerneral hint for plots:\nMake the plot window active. \n"PlotSettings->Add Trace" and select an item\nor "right mouse button  ->Add Trace" and select an item.
TEXT -112 -264 Left 0 !.param VDS=5
TEXT 240 192 Left 0 !* Model from Philips Semiconductor\n.MODEL BSS83 NMOS\n+ LEVEL=3\n+ W=1E-3\n+ L=1E-6\n+ VTO=2\n+ VMAX=1E6\n+ RS=3\n+ RD=3\n+ CJ=0.001396\n+ MJ=0.3936\n+ THETA=1E-6\n+ ETA=0.009307\n+ KAPPA=2.226