Version 4 SHEET 1 1368 1008 WIRE 128 -112 -16 -112 WIRE 176 -112 128 -112 WIRE 288 -112 256 -112 WIRE 400 -112 288 -112 WIRE -16 -80 -16 -112 WIRE 400 -80 400 -112 WIRE 128 -48 128 -112 WIRE 288 -48 288 -112 WIRE -16 32 -16 -16 WIRE 48 32 -16 32 WIRE 400 32 400 -16 WIRE 400 32 368 32 WIRE 16 112 -112 112 WIRE 48 112 16 112 WIRE 768 112 368 112 WIRE -112 128 -112 112 WIRE 16 192 16 112 WIRE 48 192 16 192 WIRE 656 192 368 192 WIRE -112 224 -112 208 WIRE 16 272 16 192 WIRE 48 272 16 272 WIRE 416 272 368 272 WIRE 48 352 32 352 WIRE 416 352 416 336 WIRE 416 352 368 352 WIRE 496 352 416 352 WIRE 608 352 496 352 WIRE 656 352 656 192 WIRE 656 352 608 352 WIRE 672 352 656 352 WIRE 768 352 768 112 WIRE 768 352 752 352 WIRE 800 352 768 352 WIRE 912 352 800 352 WIRE 608 368 608 352 WIRE 800 368 800 352 WIRE 912 368 912 352 WIRE 496 400 496 352 WIRE -64 432 -80 432 WIRE 16 432 0 432 WIRE 48 432 16 432 WIRE 384 432 368 432 WIRE 608 464 608 432 WIRE 800 464 800 432 WIRE 912 464 912 448 WIRE 16 512 16 432 WIRE 48 512 16 512 WIRE 496 512 496 480 WIRE 496 512 368 512 WIRE 496 528 496 512 WIRE -64 592 -96 592 WIRE 48 592 16 592 WIRE -64 672 -96 672 WIRE 48 672 16 672 WIRE 400 672 368 672 WIRE 512 672 480 672 WIRE 592 672 576 672 FLAG 32 352 0 FLAG -112 224 0 FLAG -96 672 0 FLAG 800 464 0 FLAG 912 464 0 FLAG 496 608 0 FLAG 592 672 0 FLAG 912 352 OUT FLAG -112 112 IN FLAG 384 432 0 FLAG 608 464 0 FLAG -80 432 0 FLAG -96 592 0 SYMBOL voltage -112 112 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL res 32 656 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 105K SYMBOL ind 160 -96 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 3.3µ SYMATTR SpiceLine Rser=10m SYMBOL cap -32 -80 R0 SYMATTR InstName C1 SYMATTR Value .22µ SYMBOL cap 384 -80 R0 SYMATTR InstName C2 SYMATTR Value .22µ SYMBOL cap 784 368 R0 SYMATTR InstName C3 SYMATTR Value 150µ SYMATTR SpiceLine Rser=5m SYMBOL res 480 384 R0 SYMATTR InstName R2 SYMATTR Value 536K SYMBOL res 480 512 R0 SYMATTR InstName R3 SYMATTR Value 102K SYMBOL cap 512 688 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C5 SYMATTR Value 680p SYMBOL res 896 352 R0 SYMATTR InstName Rload SYMATTR Value 1 SYMBOL res 384 688 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R4 SYMATTR Value 56.2k SYMBOL cap 592 368 R0 SYMATTR InstName C4 SYMATTR Value 10µ SYMATTR SpiceLine Rser=2m SYMBOL res 656 368 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 5m SYMBOL cap 400 272 R0 SYMATTR InstName C6 SYMATTR Value 22n SYMBOL cap -64 448 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C7 SYMATTR Value 4.7µ SYMBOL res 32 576 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 16.5k SYMBOL LT3120 208 240 R0 SYMATTR InstName U1 TEXT -64 760 Left 2 ;Using the LTspice built-in directive ".softstart", you can reduce the softstart\ntime of some products models' internal softstart. ".softstart 0.1" directs the\nmodel to execute its internal softstart in 10% of the true start-up time. TEXT 688 704 Left 2 !.softstart .1 TEXT 688 664 Left 2 !.tran 1m startup