Version 4
SHEET 1 968 996
WIRE -128 -144 -256 -144
WIRE 64 -144 -128 -144
WIRE 192 -144 64 -144
WIRE 384 -144 192 -144
WIRE -256 -128 -256 -144
WIRE 192 -128 192 -144
WIRE -256 -32 -256 -48
WIRE 64 -32 64 -144
WIRE 192 -32 192 -48
WIRE -32 16 -64 16
WIRE 320 16 288 16
WIRE -128 80 -128 -144
WIRE -32 80 -128 80
WIRE 384 80 384 -144
WIRE 384 80 288 80
WIRE -64 96 -80 96
WIRE 336 96 320 96
WIRE -64 144 -64 96
WIRE -32 144 -64 144
WIRE 320 144 320 96
WIRE 320 144 288 144
WIRE -464 192 -592 192
WIRE -384 192 -464 192
WIRE -336 192 -384 192
WIRE -288 192 -336 192
WIRE -128 192 -128 176
WIRE -128 192 -208 192
WIRE -64 192 -128 192
WIRE 384 192 384 176
WIRE 384 192 320 192
WIRE 480 192 384 192
WIRE 608 192 560 192
WIRE 656 192 608 192
WIRE 752 192 656 192
WIRE -592 208 -592 192
WIRE -464 208 -464 192
WIRE -64 208 -64 192
WIRE -32 208 -64 208
WIRE 320 208 320 192
WIRE 320 208 288 208
WIRE 656 208 656 192
WIRE 752 208 752 192
WIRE -336 240 -336 192
WIRE -32 272 -80 272
WIRE 336 272 288 272
WIRE -592 304 -592 288
WIRE -464 304 -464 272
WIRE 656 304 656 272
WIRE 752 304 752 288
WIRE -128 336 -128 288
WIRE -32 336 -128 336
WIRE 384 336 384 288
WIRE 384 336 288 336
WIRE -128 352 -128 336
WIRE 384 352 384 336
WIRE -336 400 -336 320
WIRE -32 400 -336 400
WIRE 608 400 608 192
WIRE 608 400 288 400
WIRE -336 416 -336 400
WIRE -208 464 -224 464
WIRE -112 464 -128 464
WIRE -32 464 -48 464
WIRE 304 464 288 464
WIRE 384 464 368 464
WIRE 480 464 464 464
WIRE -336 512 -336 496
WIRE -32 528 -48 528
WIRE 304 528 288 528
WIRE -384 592 -384 192
WIRE -32 592 -384 592
WIRE 304 592 288 592
WIRE 128 656 128 640
FLAG 384 352 0
FLAG 656 304 0
FLAG 480 464 0
FLAG -128 352 0
FLAG -464 304 0
FLAG -336 512 0
FLAG -224 464 0
FLAG 128 656 0
FLAG -256 -32 0
FLAG 752 304 0
FLAG -592 304 0
FLAG -48 528 0
FLAG -256 -144 IN
FLAG -592 192 OUT1
FLAG 752 192 OUT2
SYMBOL nmos 336 192 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL pmos 336 176 M180
WINDOW 0 58 64 Left 2
WINDOW 3 53 25 Left 2
SYMATTR InstName Q2
SYMATTR Value FDC638P
SYMBOL cap 640 208 R0
SYMATTR SpiceLine Rser=50m
SYMATTR InstName C1
SYMATTR Value 147µ
SYMBOL cap 304 480 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 220p
SYMBOL res 368 480 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 15K
SYMBOL nmos -80 192 M0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL pmos -80 176 R180
WINDOW 0 58 64 Left 2
WINDOW 3 53 33 Left 2
SYMATTR InstName Q4
SYMATTR Value FDC638P
SYMBOL ind -192 208 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 2.47µ
SYMBOL res -352 224 R0
SYMATTR InstName R2
SYMATTR Value 118K
SYMBOL res -352 400 R0
SYMATTR InstName R3
SYMATTR Value 59K
SYMBOL cap -48 480 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 220p
SYMBOL res -112 480 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 15K
SYMBOL voltage -256 -144 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 176 -144 R0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL res 736 192 R0
SYMATTR InstName Rload2
SYMATTR Value 5
SYMBOL res -608 192 R0
SYMATTR InstName Rload1
SYMATTR Value 30
SYMBOL cap -480 208 R0
SYMATTR Value 147µ
SYMATTR SpiceLine Rser=50m
SYMATTR InstName C4
SYMBOL ind 464 208 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 2.47µ
SYMBOL PowerProducts\\LTC3776 128 304 R0
SYMATTR InstName U1
TEXT 424 568 Left 2 !.tran 1.8m startup