Version 4
SHEET 1 880 680
WIRE -96 80 -176 80
WIRE -48 80 -96 80
WIRE 192 80 -48 80
WIRE 240 80 192 80
WIRE 368 80 320 80
WIRE -176 96 -176 80
WIRE -48 96 -48 80
WIRE 192 144 192 80
WIRE -176 192 -176 176
WIRE -48 208 -48 176
WIRE 48 208 -48 208
WIRE 368 208 368 80
WIRE 368 208 336 208
WIRE -96 272 -96 80
WIRE 48 288 32 288
WIRE 352 288 336 288
WIRE 432 288 416 288
WIRE -96 368 -96 352
WIRE 48 368 -96 368
WIRE 400 368 336 368
WIRE -96 384 -96 368
WIRE 400 384 400 368
WIRE 192 448 192 432
WIRE 400 464 400 448
WIRE -96 480 -96 464
FLAG 400 464 0
FLAG 432 288 0
FLAG 192 448 0
FLAG 32 288 0
FLAG -96 480 0
FLAG -176 192 0
FLAG -176 80 IN
SYMBOL PowerProducts\\LTC3490 192 288 R0
SYMATTR InstName U1
SYMBOL ind 224 96 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 3.3µ
SYMBOL cap 416 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 4.7µ
SYMBOL LED 384 384 R0
WINDOW 3 27 67 Left 2
SYMATTR Value NSPW500BS
SYMATTR InstName D1
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -64 80 R0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res -112 368 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res -112 256 R0
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL voltage -176 80 R0
SYMATTR InstName V1
SYMATTR Value 1
TEXT -8 512 Left 2 !.tran 500u startup