Version 4
SHEET 1 1100 680
WIRE 128 144 0 144
WIRE 192 144 128 144
WIRE 496 144 448 144
WIRE 592 144 496 144
WIRE 736 144 592 144
WIRE 496 160 496 144
WIRE 0 272 0 144
WIRE 592 272 592 144
WIRE 736 272 736 144
WIRE 128 288 128 144
WIRE 320 304 320 240
WIRE 496 304 496 240
WIRE 496 304 320 304
WIRE 320 352 320 304
WIRE 0 464 0 352
WIRE 128 464 128 352
WIRE 320 464 320 432
WIRE 592 480 592 336
WIRE 736 480 736 352
FLAG 320 464 0
FLAG 592 480 0
FLAG 128 464 0
FLAG 0 464 0
FLAG 736 480 0
FLAG 0 144 In
FLAG 736 144 Out
SYMBOL voltage 0 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 20V
SYMBOL PowerProducts\\LT317A 320 144 R0
SYMATTR InstName U2
SYMBOL cap 112 288 R0
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL cap 576 272 R0
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL res 480 144 R0
SYMATTR InstName R1
SYMATTR Value 120
SYMBOL res 304 336 R0
SYMATTR InstName R2
SYMATTR Value 560
SYMBOL current 736 272 R0
SYMATTR InstName I1
SYMATTR Value {Iload}
TEXT -16 520 Left 2 !.step param Iload .2 1.2 .1
TEXT -16 552 Left 2 !.tran 0 2.1m 2m startup
TEXT -16 584 Left 2 !.meas Pin AVG -V(In)*I(V1)
TEXT -16 616 Left 2 !.meas Pout AVG V(Out)*I(I1)
TEXT -16 648 Left 2 !.meas Eff param Pout/Pin
TEXT 344 520 Left 2 ;For efficiency report: View/Spice Error Log\nFor plotting report: right click Error Log & select \n.meas data and right click blank screen to add trace