Version 4
SHEET 1 880 680
WIRE -1648 -672 -1648 -720
WIRE -1552 -672 -1600 -672
WIRE -1552 -656 -1552 -672
WIRE -1648 -640 -1648 -672
WIRE -1600 -640 -1600 -672
WIRE -1984 -592 -2064 -592
WIRE -1664 -592 -1984 -592
WIRE -1344 -592 -1584 -592
WIRE -1264 -592 -1344 -592
WIRE -1024 -592 -1184 -592
WIRE -944 -592 -1024 -592
WIRE -848 -592 -944 -592
WIRE -688 -592 -848 -592
WIRE -1344 -496 -1344 -592
WIRE -1024 -496 -1024 -592
WIRE -848 -496 -848 -592
WIRE -688 -480 -688 -592
WIRE -2064 -464 -2064 -592
WIRE -2064 -288 -2064 -384
WIRE -1344 -288 -1344 -432
WIRE -1344 -288 -2064 -288
WIRE -1024 -288 -1024 -432
WIRE -1024 -288 -1344 -288
WIRE -848 -288 -848 -416
WIRE -848 -288 -1024 -288
WIRE -688 -288 -688 -416
WIRE -688 -288 -848 -288
WIRE -1344 -256 -1344 -288
WIRE -1136 -80 -1232 -80
WIRE -912 -80 -1072 -80
WIRE -1232 0 -1232 -80
WIRE -1184 0 -1232 0
WIRE -1072 0 -1120 0
WIRE -912 0 -912 -80
WIRE -912 0 -992 0
WIRE -1664 16 -1696 16
WIRE -544 16 -544 -208
WIRE -1664 32 -1664 16
WIRE -1696 64 -1696 16
WIRE -1312 80 -1664 80
WIRE -1728 96 -1824 96
WIRE -1824 112 -1824 96
WIRE -1632 112 -1664 112
WIRE -1984 128 -1984 80
WIRE -912 128 -912 0
WIRE -912 128 -992 128
WIRE -544 128 -544 96
WIRE -544 128 -912 128
WIRE -1312 144 -1312 80
WIRE -1232 144 -1232 0
WIRE -1232 144 -1312 144
WIRE -1056 144 -1232 144
WIRE -1632 160 -1632 112
WIRE -912 160 -992 160
WIRE -912 208 -912 160
WIRE -1824 224 -1824 192
FLAG -1344 -256 0
FLAG -1984 -592 Vin
FLAG -944 -592 Vout
FLAG -1552 -656 0
FLAG -912 288 0
FLAG -544 208 0
FLAG -544 -208 Vout
FLAG -1632 240 0
FLAG -1824 224 0
FLAG -1664 32 0
FLAG -1024 176 0
FLAG -1984 208 0
FLAG -1984 80 5V
FLAG -1696 128 5V
FLAG -1024 112 5V
FLAG -1824 96 PWM
FLAG -1648 -672 PWM
SYMBOL voltage -2064 -480 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName Vin1
SYMATTR Value 12
SYMBOL ind -1280 -576 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 20µ
SYMATTR SpiceLine Ipk=7 Rser=0.001 Rpar=0 Cpar=0
SYMBOL schottky -1328 -432 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value B530C
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL polcap -1040 -496 R0
WINDOW 3 24 56 Left 2
WINDOW 123 24 84 Left 2
SYMATTR Value 47µ
SYMATTR InstName Cout1
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=35 Rser=0.1
SYMBOL res -864 -512 R0
SYMATTR InstName RLoad1
SYMATTR Value 5
SYMBOL sw -1568 -592 R90
SYMATTR InstName S1
SYMBOL voltage -912 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 2.5
SYMBOL res -560 0 R0
SYMATTR InstName R1
SYMATTR Value 2.6k
SYMBOL res -560 112 R0
SYMATTR InstName R4
SYMATTR Value 2.6k
SYMBOL res -976 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 47.6k
SYMBOL cap -1120 -16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 858p
SYMBOL voltage -1632 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 2999n 1n 0n 3u)
SYMBOL res -1840 96 R0
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL Opamps\\LTC6247 -1696 96 R180
WINDOW 3 14 68 Left 2
SYMATTR InstName U1
SYMBOL Opamps\\LTC6247 -1024 144 M0
SYMATTR InstName U2
SYMBOL voltage -1984 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 5V
SYMBOL cap -1072 -96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 22p
SYMBOL load -704 -480 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(0 2 1.2m 100n 100n 600u 3m)
TEXT -1392 -800 Left 2 !.tran 0 3m 0 10n startup
TEXT -2176 -688 Left 2 !.model SW SW(Ron = 0.001 Vt = 3)
TEXT -2168 -720 Left 2 !.lib opamp.sub