Version 4
SHEET 1 4032 1080
WIRE 1056 -720 624 -720
WIRE 1184 -720 1056 -720
WIRE 1728 -720 1184 -720
WIRE 1744 -720 1728 -720
WIRE 1728 -640 1728 -720
WIRE 704 -624 704 -656
WIRE 704 -528 704 -544
WIRE 1056 -528 1056 -720
WIRE 1184 -512 1184 -720
WIRE 816 -496 784 -496
WIRE 960 -496 896 -496
WIRE 1728 -480 1728 -560
WIRE 864 -400 864 -416
WIRE 624 -384 624 -720
WIRE 960 -384 960 -496
WIRE 960 -384 896 -384
WIRE 1056 -384 1056 -448
WIRE 1056 -384 960 -384
WIRE 768 -368 672 -368
WIRE 784 -368 784 -496
WIRE 784 -368 768 -368
WIRE 832 -368 784 -368
WIRE 960 -352 896 -352
WIRE 688 -320 672 -320
WIRE 960 -320 960 -352
WIRE 1056 -320 1056 -384
WIRE 1184 -320 1184 -448
WIRE 624 -160 624 -304
WIRE 688 -160 688 -320
WIRE 864 -160 864 -336
WIRE 960 -160 960 -240
WIRE 1056 -160 1056 -240
WIRE 1184 -160 1184 -240
FLAG 1056 -160 0
FLAG 1184 -160 0
FLAG 1744 -720 Vout
FLAG 960 -160 0
FLAG 864 -160 0
FLAG 704 -528 0
FLAG 624 -160 0
FLAG 688 -160 0
FLAG 704 -656 3V
FLAG 864 -416 3V
FLAG 768 -368 EAOUT
FLAG 1728 -480 0
SYMBOL res 1072 -544 M0
WINDOW 0 -17 10 Left 2
WINDOW 3 -26 106 Left 2
SYMATTR InstName R2
SYMATTR Value 1k3
SYMBOL res 1072 -336 M0
WINDOW 0 -17 9 Left 2
WINDOW 3 -49 107 Left 2
SYMATTR InstName R3
SYMATTR Value 1k21
SYMBOL cap 1200 -512 M0
WINDOW 0 -59 6 Left 2
WINDOW 3 -40 55 Left 2
SYMATTR InstName _C_5V
SYMATTR Value 470µ
SYMBOL res 1168 -336 R0
SYMATTR InstName R1
SYMATTR Value 15m
SYMBOL g 624 -400 M0
SYMATTR InstName G1
SYMATTR Value 2
SYMBOL Opamps\\UniversalOpamp2 864 -368 M0
SYMATTR InstName U1
SYMATTR Value2 Avol=1Meg GBW=1Meg Slew=1Meg
SYMBOL voltage 960 -336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 2.5
SYMBOL voltage 704 -640 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 3
SYMBOL bi 1728 -640 R0
WINDOW 3 15 90 Left 2
SYMATTR InstName B2
SYMATTR Value I=if (V(Vout)<{UVLO},0,{Pout}/V(Vout))
SYMBOL res 912 -512 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 22k
TEXT 1352 -232 Left 2 !.tran 10m startup uic
TEXT 1352 -272 Left 2 !.param Pout=10
TEXT 1352 -296 Left 2 !.param UVLO=2.6-0.5