Version 4
SHEET 1 1688 700
WIRE 528 80 240 80
WIRE 880 80 528 80
WIRE 240 96 240 80
WIRE 880 96 880 80
WIRE 832 112 800 112
WIRE 528 128 528 80
WIRE 800 176 800 112
WIRE 800 176 704 176
WIRE 240 192 240 176
WIRE 880 208 880 192
WIRE 928 208 880 208
WIRE 1040 208 1008 208
WIRE 1056 208 1040 208
WIRE 1152 208 1136 208
WIRE 1232 208 1152 208
WIRE 1232 224 1232 208
WIRE 352 240 336 240
WIRE 736 256 704 256
WIRE 1040 256 1040 208
WIRE 1040 256 736 256
WIRE 176 320 160 320
WIRE 256 320 240 320
WIRE 352 320 336 320
WIRE 736 320 704 320
WIRE 1152 320 1152 208
WIRE 1152 320 736 320
WIRE 1232 320 1232 304
WIRE 880 336 880 208
WIRE 1024 336 880 336
WIRE 1152 336 1152 320
WIRE 880 352 880 336
WIRE 1024 384 1024 336
WIRE 224 400 160 400
WIRE 352 400 288 400
WIRE 800 400 704 400
WIRE 1152 416 1152 400
WIRE 800 432 800 400
WIRE 832 432 800 432
WIRE 880 480 880 448
WIRE 1024 480 1024 448
WIRE 432 528 432 512
WIRE 624 528 624 512
FLAG 240 192 0
FLAG 160 320 0
FLAG 160 400 0
FLAG 432 528 0
FLAG 624 528 0
FLAG 880 480 0
FLAG 1024 480 0
FLAG 1152 416 0
FLAG 1232 320 0
FLAG 1232 208 OUT
FLAG 240 80 IN
SYMBOL PMOS 832 192 M180
WINDOW 0 60 100 Left 2
WINDOW 3 60 60 Left 2
SYMATTR InstName Q1
SYMATTR Value FDC638P
SYMBOL NMOS 832 352 R0
WINDOW 3 56 106 Left 2
SYMATTR Value FDS6680A
SYMATTR InstName Q2
SYMBOL ind 912 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 50µ
SYMBOL polcap 1136 336 R0
SYMATTR InstName C1
SYMATTR Value 390µ
SYMATTR SpiceLine Rser=.01
SYMBOL VOLTAGE 240 80 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL cap 288 384 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 470p
SYMBOL cap 240 304 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 3300p
SYMBOL schottky 1008 448 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL cap 720 256 R0
WINDOW 0 38 18 Left 2
WINDOW 3 34 48 Left 2
SYMATTR InstName C4
SYMATTR Value 1000p
SYMBOL RES 352 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL res 1040 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 50m
SYMBOL PowerProducts\\LTC1148L-3.3 528 320 R0
SYMATTR InstName U1
SYMBOL res 1216 208 R0
SYMATTR InstName Rload
SYMATTR Value 3
TEXT 1056 536 Left 2 !.tran 1m startup