Version 4 SHEET 1 3984 844 WIRE 1520 -464 1520 -480 WIRE 1520 -368 1520 -384 WIRE 1744 -368 1520 -368 WIRE 2096 -368 1744 -368 WIRE 1520 -352 1520 -368 WIRE 1744 -352 1744 -368 WIRE 2096 -320 2096 -368 WIRE 2208 -288 2208 -304 WIRE 2208 -192 2208 -208 WIRE 2208 -192 2064 -192 WIRE 2208 -144 2208 -192 WIRE 2400 -80 2400 -112 WIRE 1296 16 1296 0 WIRE 1408 16 1408 0 WIRE 1744 16 1744 0 WIRE 1856 16 1856 0 WIRE 1856 16 1744 16 WIRE 1968 16 1968 0 WIRE 1968 16 1856 16 WIRE 2096 16 2096 -256 WIRE 2096 16 1968 16 WIRE 2208 16 2208 -80 WIRE 2208 16 2096 16 WIRE 2400 16 2400 0 WIRE 2400 16 2208 16 WIRE 864 80 864 64 WIRE 1520 128 1520 0 WIRE 864 176 864 160 WIRE 1232 176 864 176 WIRE 1296 176 1296 96 WIRE 1296 176 1232 176 WIRE 1440 176 1296 176 WIRE 1744 176 1744 16 WIRE 1744 176 1536 176 WIRE 800 240 800 224 WIRE 1632 288 1632 0 WIRE 800 336 800 320 WIRE 1232 336 800 336 WIRE 1408 336 1408 96 WIRE 1408 336 1232 336 WIRE 1552 336 1408 336 WIRE 1744 336 1744 176 WIRE 1744 336 1648 336 FLAG 1520 -480 0 FLAG 864 64 0 FLAG 800 224 0 FLAG 2400 16 Out FLAG 1232 176 InA FLAG 1232 336 InB FLAG 2400 -112 0 FLAG 2208 -304 0 SYMBOL VOLTAGE 864 64 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value PWL(0 0 50m 72 100m 0) SYMBOL LTC4371 1632 -192 R0 SYMATTR InstName U1 SYMBOL nmos 1552 288 M90 WINDOW 0 -21 61 VLeft 2 WINDOW 3 53 47 VTop 2 WINDOW 123 83 46 VTop 2 SYMATTR InstName M2 SYMATTR Value IPT020N10N3 SYMATTR Value2 M=2 SYMBOL res 1504 -480 R0 SYMATTR InstName Rz SYMATTR Value 30K SYMBOL cap 2080 -320 R0 SYMATTR InstName C1 SYMATTR Value 2.2µ SYMBOL nmos 1440 128 M90 WINDOW 0 -21 55 VLeft 2 WINDOW 3 59 56 VTop 2 WINDOW 123 88 47 VTop 2 SYMATTR InstName M1 SYMATTR Value IPT020N10N3 SYMATTR Value2 M=2 SYMBOL res 1280 0 R0 SYMATTR InstName RDA SYMATTR Value 20K SYMBOL res 1392 0 R0 SYMATTR InstName RDB SYMATTR Value 20K SYMBOL res 2192 -304 R0 SYMATTR InstName R1 SYMATTR Value 33K SYMBOL VOLTAGE 800 224 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 48 SYMBOL CURRENT 2400 -80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I1 SYMATTR Value 50 SYMBOL LED 2192 -144 R0 SYMATTR InstName D1 SYMATTR Value QTLP690C TEXT 2072 208 Left 2 !.tran 100m startup TEXT 1912 104 Left 2 ;Note:\n M=2 indicates two Power MOSFETS in parallel.