Version 4 SHEET 1 880 680 WIRE 464 16 -48 16 WIRE -48 80 -48 16 WIRE -32 80 -48 80 WIRE 304 80 256 80 WIRE 304 96 304 80 WIRE -144 176 -240 176 WIRE -32 176 -144 176 WIRE 304 176 304 160 WIRE 304 176 256 176 WIRE 352 176 304 176 WIRE 464 176 464 16 WIRE 464 176 432 176 WIRE 592 176 464 176 WIRE 688 176 592 176 WIRE -240 192 -240 176 WIRE -144 192 -144 176 WIRE 304 192 304 176 WIRE 592 192 592 176 WIRE 688 192 688 176 WIRE 464 240 464 176 WIRE -32 272 -144 272 WIRE 304 272 304 256 WIRE 304 272 256 272 WIRE -240 288 -240 272 WIRE -144 288 -144 272 WIRE 592 288 592 256 WIRE 688 288 688 272 WIRE -144 368 -144 352 WIRE -32 368 -48 368 WIRE 464 368 464 320 WIRE 464 368 256 368 WIRE 464 384 464 368 WIRE 464 480 464 464 FLAG -240 288 0 FLAG -48 368 0 FLAG -144 368 0 FLAG 464 480 0 FLAG 688 288 0 FLAG 592 288 0 FLAG 688 176 OUT FLAG -240 176 IN SYMBOL voltage -240 176 R0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res -160 176 R0 SYMATTR InstName R1 SYMATTR Value 15K SYMBOL cap -160 288 R0 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL ind 336 192 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 6.8µ SYMBOL res 448 224 R0 SYMATTR InstName R2 SYMATTR Value 31.6K SYMBOL res 448 368 R0 SYMATTR InstName R3 SYMATTR Value 10K SYMBOL cap 576 192 R0 SYMATTR InstName C2 SYMATTR Value 10µ SYMBOL res 672 176 R0 SYMATTR InstName R4 SYMATTR Value 6.6 SYMBOL schottky 288 256 M180 WINDOW 0 22 62 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value MBR0520L SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 288 96 R0 SYMATTR InstName C3 SYMATTR Value .1µ SYMBOL LT3502A 112 224 R0 SYMATTR InstName U1 TEXT 160 480 Left 2 !.tran 1.2m startup