Version 4
SHEET 1 880 680
WIRE 384 -352 -176 -352
WIRE 80 -304 -32 -304
WIRE 384 -304 384 -352
WIRE 384 -304 368 -304
WIRE -32 -288 -32 -304
WIRE 384 -208 384 -304
WIRE 384 -208 368 -208
WIRE -32 -192 -32 -208
WIRE 384 -112 368 -112
WIRE 480 -112 464 -112
WIRE 512 -112 480 -112
WIRE 608 -112 512 -112
WIRE 512 -96 512 -112
WIRE 608 -96 608 -112
WIRE 480 -16 480 -112
WIRE 480 -16 368 -16
WIRE 512 0 512 -32
WIRE 608 0 608 -16
WIRE 400 80 368 80
WIRE 400 96 400 80
WIRE -176 176 -176 -352
WIRE -128 176 -176 176
WIRE 80 176 -128 176
WIRE 400 192 400 176
WIRE -176 208 -176 176
WIRE 80 272 16 272
WIRE 400 272 368 272
WIRE 16 288 16 272
WIRE 400 288 400 272
WIRE -176 304 -176 288
WIRE 224 320 224 304
WIRE 16 384 16 368
WIRE 400 384 400 368
FLAG -32 -192 0
FLAG 400 384 0
FLAG 224 320 0
FLAG -176 304 0
FLAG 16 384 0
FLAG 512 0 0
FLAG 608 0 0
FLAG 400 192 0
FLAG -32 -304 USB
FLAG -128 176 BAT
FLAG 608 -112 Vout
SYMBOL voltage -32 -304 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 384 272 R0
SYMATTR InstName R1
SYMATTR Value 2K
SYMBOL Misc\\battery -176 192 R0
WINDOW 123 24 146 Left 2
WINDOW 39 24 125 Left 2
SYMATTR Value 4
SYMATTR InstName V2
SYMBOL res 0 272 R0
SYMATTR InstName R2
SYMATTR Value 1.24K
SYMBOL ind 368 -96 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 2.2µ
SYMBOL cap 496 -96 R0
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL res 384 80 R0
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL PowerProducts\\LTC3550-1 224 -16 R0
SYMATTR InstName U1
SYMBOL res 592 -112 R0
SYMATTR InstName Rload
SYMATTR Value 3.125
TEXT 504 240 Left 2 !.tran 150u startup