Version 4 SHEET 1 3704 1416 WIRE 1440 736 1360 736 WIRE 1536 736 1440 736 WIRE 2048 736 1536 736 WIRE 1360 768 1360 736 WIRE 1440 784 1440 736 WIRE 2336 784 2288 784 WIRE 1968 800 1744 800 WIRE 2048 800 2048 736 WIRE 2048 800 1968 800 WIRE 1536 816 1536 736 WIRE 2048 832 2048 800 WIRE 2624 832 2128 832 WIRE 2672 832 2624 832 WIRE 1360 880 1360 848 WIRE 1440 880 1440 848 WIRE 2128 912 2128 896 WIRE 2128 912 2048 912 WIRE 2208 912 2208 784 WIRE 2400 912 2400 784 WIRE 2400 912 2288 912 WIRE 2496 912 2480 912 WIRE 2512 912 2496 912 WIRE 2624 912 2592 912 WIRE 1264 928 1264 896 WIRE 2048 928 2048 912 WIRE 1744 944 1744 800 WIRE 2496 944 2496 912 WIRE 2400 960 2400 912 WIRE 2400 960 2368 960 WIRE 2208 976 2208 912 WIRE 2304 976 2272 976 WIRE 2400 992 2368 992 WIRE 1536 1008 1536 896 WIRE 1584 1008 1536 1008 WIRE 2000 1008 1904 1008 WIRE 1264 1040 1264 1008 WIRE 2544 1040 2448 1040 WIRE 2672 1040 2672 896 WIRE 2672 1040 2544 1040 WIRE 2752 1040 2672 1040 WIRE 2864 1040 2752 1040 WIRE 2992 1040 2864 1040 WIRE 1376 1072 1344 1072 WIRE 1392 1072 1376 1072 WIRE 1504 1072 1472 1072 WIRE 1536 1072 1504 1072 WIRE 1584 1072 1536 1072 WIRE 1968 1072 1968 800 WIRE 1968 1072 1904 1072 WIRE 2544 1072 2544 1040 WIRE 2864 1072 2864 1040 WIRE 1344 1088 1344 1072 WIRE 2672 1088 2672 1040 WIRE 1504 1104 1504 1072 WIRE 2048 1104 2048 1024 WIRE 2208 1120 2208 976 WIRE 2448 1120 2448 1104 WIRE 1968 1136 1904 1136 WIRE 1264 1184 1264 1152 WIRE 1344 1184 1344 1152 WIRE 1504 1184 1504 1168 WIRE 2016 1200 1904 1200 WIRE 2208 1200 2016 1200 WIRE 2368 1200 2208 1200 WIRE 2448 1200 2368 1200 WIRE 2544 1200 2544 1152 WIRE 2544 1200 2448 1200 WIRE 2672 1200 2672 1152 WIRE 2864 1200 2864 1152 WIRE 2544 1216 2544 1200 WIRE 1264 1296 1264 1264 WIRE 1744 1296 1744 1264 WIRE 2544 1312 2544 1296 FLAG 1744 1296 0 FLAG 2672 1200 0 FLAG 1360 880 0 FLAG 1440 880 0 FLAG 2864 1200 0 FLAG 2864 1040 OUT FLAG 2048 1104 0 FLAG 1344 1184 0 FLAG 1504 1184 0 FLAG 2544 1312 0 FLAG 1360 736 IN FLAG 2624 992 0 FLAG 2368 1264 0 FLAG 1536 1072 comp FLAG 1376 1072 comp1 FLAG 2016 1200 fb FLAG 2752 1104 0 FLAG 2336 1008 0 FLAG 1264 1040 0 FLAG 1264 896 P3V3 FLAG 2336 944 P3V3 FLAG 1264 1296 0 FLAG 1264 1152 P0V1 FLAG 2400 992 P0V1 FLAG 2992 1120 0 FLAG 2496 1008 0 SYMBOL ind2 2032 816 R0 SYMATTR InstName L1 SYMATTR Value 22µ SYMATTR Type ind SYMBOL VOLTAGE 1360 752 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL polcap 2656 1088 R0 WINDOW 123 28 83 Left 0 WINDOW 3 25 56 Left 0 SYMATTR Value2 x1 SYMATTR Value 10µ SYMATTR SpiceLine Rser=.05 SYMATTR InstName C1 SYMBOL polcap 1424 784 R0 SYMATTR InstName C2 SYMATTR Value 100µ SYMBOL cap 1488 1104 R0 SYMATTR InstName C3 SYMATTR Value 5n SYMBOL cap 1328 1088 R0 SYMATTR InstName C4 SYMATTR Value 0.4µ SYMBOL res 1488 1056 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value 400 SYMBOL POWERPRODUCTS\\LTC1530 1744 1104 R0 WINDOW 3 16 176 Left 0 SYMATTR InstName U1 SYMBOL res 1520 800 R0 SYMATTR InstName R2 SYMATTR Value 50K SYMBOL NMOS 2000 928 R0 SYMATTR InstName Q2 SYMATTR Value IRF7201 SYMBOL res 2528 1056 R0 SYMATTR InstName R3 SYMATTR Value 68.5K SYMBOL res 2528 1200 R0 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL res 2848 1056 R0 SYMATTR InstName Rload SYMATTR Value 20 SYMBOL ind2 2640 928 R180 WINDOW 0 36 80 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName L2 SYMATTR Value 22µ SYMATTR Type ind SYMBOL cap 2112 832 R0 SYMATTR InstName C5 SYMATTR Value .1µ SYMBOL schottky 2656 832 R0 SYMATTR InstName D1 SYMATTR Value MBR20100CT SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 2432 1040 R0 SYMATTR InstName C8 SYMATTR Value 150p SYMBOL res 2432 1104 R0 SYMATTR InstName R5 SYMATTR Value 20k SYMBOL cap 2352 1200 R0 SYMATTR InstName C6 SYMATTR Value 1p SYMBOL cap 2736 1040 R0 SYMATTR InstName C7 SYMATTR Value 10µ SYMATTR SpiceLine Rser=0.005 SYMBOL res 2608 896 R0 SYMATTR InstName R6 SYMATTR Value 0.4 SYMBOL VOLTAGE 1264 912 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 3.3 SYMBOL res 2496 896 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R7 SYMATTR Value 100k SYMBOL res 2304 896 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R8 SYMATTR Value 300k SYMBOL res 2304 768 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R9 SYMATTR Value 100k SYMBOL diode 2272 960 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D2 SYMBOL res 2192 1104 R0 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL cap 2400 768 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C9 SYMATTR Value 200p SYMBOL VOLTAGE 1264 1168 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 0.1 SYMBOL current 2992 1040 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName I1 SYMATTR Value PWL(0 0 6m 0 6.5m 0.5 7m 0.5 7.5m 0.7 8m 0.7 8.5m 1) SYMBOL Opamps\\LT1797 2336 912 M0 SYMATTR InstName U2 SYMBOL res 2608 896 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R11 SYMATTR Value 1k SYMBOL cap 2480 944 R0 SYMATTR InstName C10 SYMATTR Value 10n TEXT 1928 1304 Left 0 !.tran 10m startup TEXT 2536 792 Left 0 !k L1 L2 1 TEXT 992 1000 Left 0 ;.ic v(comp)=4\n.ic v(out)=9