* Z:\home\khalils\Downloads\files\data\raw_asc\fra_eg6_LT3763_probe_current.asc
* Generated by LTspice 26.0.1 for Windows.
* In this example, fraprobe &1 analyzes the loop gain differentially across the output current sense resistor R9.\nAfter the simulation completes, in the Bode plot window (fra_eg6_LT3763_probe_current.fra_1.raw)\nRight click -> Add Traces -> probe_1\nThen Right click -> Notes & Annotations -> Annotate Phase margin\nPlot probe_mod to display the modulator gain (compensation point VC to output current sense)\nPlot probe_vc to display the gain from output current sense to the compensation point VC
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LT3763.asy)
@1 SP SPFB delay=50u fstart=200 fend=362k oct=2 fcoarse=16k nmax=1 3 65k 3 66k 1 pp0=20m pp1=5m f0=24k f1=96k tavgmin=100u tsettle=10u
&1 SP OUT SPFB OUT
&vc VC 0 SPFB OUT
&mod SP OUT VC 0
MQ2 SW BG 0 0 RJK0301DPB
C7 N001 0 4.7
C5 N005 0 .22
C3 N009 0 .001
R7 IN N002 84.5K
R2 N010 N009 50
L1 SW SP 1.5 Rser=2m
V2 IN 0 24
D2 OUT N011 PT-121-B
C8 INTVCC 0 4.7
R11 N012 0 12.1K
R6 N001 N004 1K
C2 VC 0 4700p Rser=59K
R9 SP OUT 2.5m
D1 INTVCC N006 1N5819
R1 N013 0 82.5K
R3 N008 N007 50
R10 OUT N012 47.5K
XU1 BG INTVCC N001 N002 N005 N004 N003 N008 NC_01 N005 N012 0 N005 N005 SS OUT SPFB VC N010 N013 N006 INTVCC SW PWM_OUT TG LT3763 ;pnba BG)INTVCC)VIN)EN/UVLO)VREF)VINN)VINP)IVINMON)_FAULT)FBIN)FB)GND)CTRL2)CTRL1)SS)SENSE-)SENSE+)VC)ISMON)RT)BOOST)PWM)SW)PWMOUT)TG
R5 IN N003 1K
MQ1 N001 TG SW SW RJK0305DPB
C1 SS 0 .01
R4 IN N001 2.5m
C9 N006 SW .22
R8 N002 0 15.4K
C6 N003 N004 1
C10 OUT 0 220 x2 V=6.3 Irms=3.2 Rser=0.012 Lser=0 mfg="KEMET" pn="T520V227M006ASE012" type="Tantalum"
C4 N007 0 .001
MQ3 N011 PWM_OUT 0 0 IRFH6200
.model D D
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.dio
.model NMOS NMOS
.model PMOS PMOS
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.mos
.options trtol=3
.ic V(OUT)=4.47 V(SS)=3.32 V(VC)=860m V(INTVCC)=5
.fra
.lib LT3763.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 1428 740
WIRE 0 -688 -144 -688
WIRE 224 -688 0 -688
WIRE 256 -688 224 -688
WIRE 352 -688 336 -688
WIRE 432 -688 352 -688
WIRE 480 -688 432 -688
WIRE 752 -688 480 -688
WIRE -144 -672 -144 -688
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WIRE 480 -672 480 -688
WIRE 480 -592 480 -608
WIRE -144 -576 -144 -592
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WIRE 224 -560 224 -592
WIRE 240 -560 224 -560
WIRE 256 -560 240 -560
WIRE 336 -560 320 -560
WIRE 352 -560 352 -592
WIRE 352 -560 336 -560
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WIRE 624 -448 560 -448
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WIRE 128 -352 32 -352
WIRE 144 -352 128 -352
WIRE 560 -352 560 -368
WIRE 560 -352 528 -352
WIRE 672 -352 672 -368
WIRE 32 -336 32 -352
WIRE 752 -336 752 -688
WIRE 32 -256 32 -272
WIRE 128 -256 128 -352
WIRE 144 -256 128 -256
WIRE 592 -256 528 -256
WIRE 704 -256 592 -256
WIRE 560 -240 560 -352
WIRE 128 -160 128 -256
WIRE 144 -160 128 -160
WIRE 560 -160 560 -176
WIRE 560 -160 528 -160
WIRE 720 -160 560 -160
WIRE 752 -160 752 -240
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WIRE 800 -160 752 -160
WIRE 912 -160 880 -160
WIRE 928 -160 912 -160
WIRE 1024 -160 1008 -160
WIRE 1056 -160 1024 -160
WIRE 1104 -160 1056 -160
WIRE 1216 -160 1104 -160
WIRE 752 -144 752 -160
WIRE 1104 -144 1104 -160
WIRE 1216 -80 1216 -160
WIRE 128 -64 128 -160
WIRE 144 -64 128 -64
WIRE 560 -64 528 -64
WIRE 704 -64 560 -64
WIRE 1104 -64 1104 -80
WIRE 880 -16 656 -16
WIRE 912 -16 912 -160
WIRE 912 -16 880 -16
WIRE -48 32 -64 32
WIRE 32 32 16 32
WIRE 144 32 112 32
WIRE 560 32 528 32
WIRE 592 32 592 -16
WIRE 592 32 560 32
WIRE 688 32 592 32
WIRE 912 32 912 -16
WIRE 912 32 784 32
WIRE 688 96 672 96
WIRE 800 96 784 96
WIRE 1056 112 1056 -160
WIRE -48 128 -64 128
WIRE 32 128 16 128
WIRE 144 128 112 128
WIRE 672 128 672 96
WIRE 672 128 528 128
WIRE 800 128 800 96
WIRE 800 128 672 128
WIRE 1024 128 1024 -160
WIRE 1024 128 800 128
WIRE 1216 144 1216 -16
WIRE -128 224 -144 224
WIRE 0 224 -64 224
WIRE 128 224 0 224
WIRE 144 224 128 224
WIRE 1056 224 1056 192
WIRE 1056 224 528 224
WIRE 1168 224 1152 224
WIRE 1056 240 1056 224
WIRE 1216 256 1216 240
WIRE 48 320 32 320
WIRE 128 320 112 320
WIRE 144 320 128 320
WIRE 608 320 528 320
WIRE 864 320 608 320
WIRE -160 336 -192 336
WIRE -128 336 -160 336
WIRE 0 336 0 224
WIRE 0 336 -32 336
WIRE 1056 336 1056 320
WIRE 864 368 864 320
WIRE 1152 368 1152 224
WIRE 1152 368 864 368
WIRE -160 400 -192 400
WIRE -128 400 -160 400
WIRE 80 416 32 416
WIRE 144 416 80 416
WIRE 272 496 272 480
WIRE 400 496 400 480
WIRE 0 512 0 336
WIRE 16 512 0 512
WIRE 144 512 112 512
WIRE 176 512 144 512
WIRE 144 576 112 576
WIRE 176 576 144 576
WIRE 272 592 272 576
SYMBOL res -16 -560 R0
SYMATTR InstName R8
SYMATTR Value 15.4K
SYMBOL voltage -144 -688 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 24
SYMBOL LED 1200 -80 R0
SYMATTR InstName D2
SYMATTR Value PT-121-B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 256 -544 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C6
SYMATTR Value 1
SYMBOL nmos 704 -336 R0
SYMATTR InstName Q1
SYMATTR Value RJK0305DPB
SYMBOL res 1040 224 R0
SYMATTR InstName R11
SYMATTR Value 12.1K
SYMBOL res 336 -688 R0
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL ind 784 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1.5
SYMATTR SpiceLine Rser=2m
SYMBOL cap 544 -240 R0
SYMATTR InstName C9
SYMATTR Value .22
SYMBOL fraprobe 64 592 R0
SYMATTR InstName &mod
SYMBOL cap 16 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL res 240 -672 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 2.5m
SYMBOL nmos 704 -144 R0
SYMATTR InstName Q2
SYMATTR Value RJK0301DPB
SYMBOL fra 592 -16 R90
WINDOW 0 -16 -32 VBottom 2
SYMATTR InstName @1
SYMATTR SpiceLine delay=50u fstart=200 fend=362k oct=2 fcoarse=16k nmax=1 3 65k 3 66k 1 pp0=20m pp1=5m f0=24k f1=96k tavgmin=100u tsettle=10u
SYMBOL res 128 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL cap 656 -432 R0
SYMATTR InstName C8
SYMATTR Value 4.7
SYMBOL fraprobe 736 112 R0
SYMATTR InstName &1
SYMBOL PowerProducts\\LT3763 336 -16 R0
SYMATTR InstName U1
SYMBOL cap 112 304 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value .01
SYMBOL res 912 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R9
SYMATTR Value 2.5m
SYMBOL cap 16 16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value .001
SYMBOL cap 464 -672 R0
SYMATTR InstName C7
SYMATTR Value 4.7
SYMBOL res 1040 96 R0
SYMATTR InstName R10
SYMATTR Value 47.5K
SYMBOL cap 16 -336 R0
SYMATTR InstName C5
SYMATTR Value .22
SYMBOL schottky 544 -432 R0
SYMATTR InstName D1
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL fraprobe -80 416 R0
SYMATTR InstName &vc
SYMBOL res -16 -688 R0
SYMATTR InstName R7
SYMATTR Value 84.5K
SYMBOL nmos 1168 144 R0
SYMATTR InstName Q3
SYMATTR Value IRFH6200
SYMBOL res 256 480 R0
SYMATTR InstName R1
SYMATTR Value 82.5K
SYMBOL res 128 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL polcap 1088 -144 R0
WINDOW 3 38 36 Left 2
WINDOW 123 29 63 Left 2
SYMATTR Value 220
SYMATTR Value2 x2
SYMATTR InstName C10
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=6.3 Irms=3.2 Rser=0.012 Lser=0 mfg="KEMET" pn="T520V227M006ASE012" type="Tantalum"
SYMBOL cap -64 208 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
WINDOW 39 53 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 4700p
SYMATTR SpiceLine Rser=59K
SYMBOL res 208 -688 R0
WINDOW 0 37 48 Left 2
SYMATTR InstName R5
SYMATTR Value 1K
FLAG 400 496 0
FLAG 272 592 0
FLAG 32 320 0
FLAG -144 224 0
FLAG -64 128 0
FLAG -64 32 0
FLAG 32 -256 0
FLAG -144 -576 0
FLAG 0 -448 0
FLAG 480 -592 0
FLAG 672 -352 0
FLAG 752 -48 0
FLAG 1056 336 0
FLAG 1104 -64 0
FLAG 1216 256 0
FLAG -144 -688 IN
FLAG 1216 -160 OUT
FLAG 128 320 SS
FLAG 128 224 VC
FLAG 720 -160 SW
FLAG 560 -64 BG
FLAG 592 -256 TG
FLAG 624 -448 INTVCC
FLAG 80 416 INTVCC
FLAG 608 320 PWM_OUT
FLAG 880 -16 SP
FLAG 560 32 SPFB
FLAG -160 336 SPFB
FLAG -32 400 0
FLAG -160 400 OUT
FLAG 144 512 SP
FLAG 144 576 OUT
FLAG 16 576 0
TEXT 640 440 Left 2 !.options trtol=3\n.ic V(OUT)=4.47 V(SS)=3.32 V(VC)=860m V(INTVCC)=5\n.fra
TEXT -136 -888 Left 2 ;In this example, fraprobe &1 analyzes the loop gain differentially across the output current sense resistor R9.\nAfter the simulation completes, in the Bode plot window (fra_eg6_LT3763_probe_current.fra_1.raw)\nRight click -> Add Traces -> probe_1\nThen Right click -> Notes & Annotations -> Annotate Phase margin\nPlot probe_mod to display the modulator gain (compensation point VC to output current sense)\nPlot probe_vc to display the gain from output current sense to the compensation point VC