Version 4 SHEET 1 2608 1256 WIRE 736 -448 624 -448 WIRE 832 -448 736 -448 WIRE 912 -448 832 -448 WIRE 928 -448 912 -448 WIRE 1040 -448 1008 -448 WIRE 1152 -448 1040 -448 WIRE 1344 -448 1248 -448 WIRE 1440 -448 1344 -448 WIRE 1536 -448 1440 -448 WIRE 1664 -448 1536 -448 WIRE 1808 -448 1664 -448 WIRE 736 -432 736 -448 WIRE 1536 -432 1536 -448 WIRE 1664 -432 1664 -448 WIRE 1808 -432 1808 -448 WIRE 2064 -416 1856 -416 WIRE 2176 -416 2144 -416 WIRE 912 -384 912 -448 WIRE 1040 -384 1040 -448 WIRE 1440 -384 1440 -448 WIRE 1872 -368 1856 -368 WIRE 928 -352 912 -384 WIRE 1024 -352 1040 -384 WIRE 1232 -352 1232 -400 WIRE 1232 -352 1136 -352 WIRE 624 -336 624 -448 WIRE 624 -336 512 -336 WIRE 736 -336 736 -352 WIRE 928 -336 928 -352 WIRE 1024 -336 1024 -352 WIRE 1136 -336 1136 -352 WIRE 1232 -336 1232 -352 WIRE 1344 -336 1344 -448 WIRE 1536 -336 1536 -368 WIRE 1664 -336 1664 -352 WIRE 1808 -336 1808 -352 WIRE 512 -288 512 -336 WIRE 624 -288 624 -336 WIRE 832 -256 832 -448 WIRE 864 -256 832 -256 WIRE 1440 -240 1440 -320 WIRE 1440 -240 1376 -240 WIRE 512 -192 512 -208 WIRE 624 -192 624 -208 WIRE 624 -192 512 -192 WIRE 864 -192 624 -192 WIRE 624 -160 624 -192 WIRE 1440 -144 1376 -144 WIRE 1488 -144 1440 -144 WIRE 1568 -144 1552 -144 WIRE 1440 -128 1440 -144 WIRE 864 -112 784 -112 WIRE 624 -64 624 -80 WIRE 624 -64 448 -64 WIRE 624 -48 624 -64 WIRE 784 -48 784 -112 WIRE 784 -48 624 -48 WIRE 448 -32 448 -64 WIRE 624 -32 624 -48 WIRE 1440 -32 1440 -48 WIRE 1440 -32 1376 -32 WIRE 784 48 768 48 WIRE 864 48 848 48 WIRE 448 64 448 48 WIRE 624 64 624 48 WIRE 624 64 448 64 WIRE 624 112 624 64 WIRE 1248 128 1248 112 WIRE 1120 144 1120 112 WIRE 976 176 976 112 WIRE 1248 224 1248 208 WIRE 976 288 976 256 FLAG 736 -336 0 FLAG 976 288 0 FLAG 1536 -336 0 FLAG 1664 -336 0 FLAG 736 -448 IN FLAG 1808 -448 OUT FLAG 1120 144 0 FLAG 1248 224 0 FLAG 768 48 0 FLAG 1568 -144 0 FLAG 1808 -336 0 FLAG 1872 -368 0 FLAG 2176 -416 0 FLAG 624 112 0 SYMBOL voltage 736 -448 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage 976 160 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 13 100 Left 2 SYMATTR Value PULSE(0 3.3 50m 10n 10n 500m 1000m 1) SYMATTR InstName V2 SYMBOL nmos 1152 -400 R270 WINDOW 0 53 42 VTop 2 WINDOW 3 -7 79 VLeft 2 SYMATTR InstName M1 SYMATTR Value BSC320N20NS3 SYMBOL cap 1520 -432 R0 WINDOW 3 39 36 Left 2 WINDOW 39 20 65 Left 2 SYMATTR Value 1µ SYMATTR SpiceLine Rser=7m SYMATTR InstName C1 SYMBOL res 1648 -448 R0 SYMATTR InstName R1 SYMATTR Value 13.5 SYMBOL cap 1424 -384 R0 SYMATTR InstName C2 SYMATTR Value 0.1µ SYMBOL res 1232 112 R0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL res 1424 -144 R0 SYMATTR InstName R3 SYMATTR Value 100K SYMBOL cap 848 32 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 10n SYMBOL res 912 -432 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R6 SYMATTR Value 0.5m SYMBOL cap 1488 -128 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C4 SYMATTR Value 1µ SYMBOL voltage 2048 -416 R270 WINDOW 3 -32 56 VBottom 2 WINDOW 0 32 56 VTop 2 SYMATTR Value PWL(0 0 60m 0 +1u 1 +10m 1 +1u 0) SYMATTR InstName V3 SYMBOL sw 1808 -336 R180 WINDOW 0 -17 96 Right 2 WINDOW 3 -32 -3 Right 2 SYMATTR InstName S1 SYMBOL LTC7000 1120 -112 R0 SYMATTR InstName U1 SYMBOL res 608 -176 R0 SYMATTR InstName R4 SYMATTR Value 18k SYMBOL res 608 -48 R0 SYMATTR InstName R5 SYMATTR Value 39k SYMBOL res 608 -304 R0 SYMATTR InstName R7 SYMATTR Value 1000k SYMBOL res 496 -304 R0 SYMATTR InstName R8 SYMATTR Value 1000k TEXT 1832 -264 Center 2 ;Short load with 10mohm\nto test current limit. TEXT 1448 136 Left 2 !.tran 500m startup\n.model SW SW(Ron=10m Roff=1G Vt=0.5 Vh=-0.3)