Version 4
SHEET 1 1320 696
WIRE -192 -208 -400 -208
WIRE 464 -208 -192 -208
WIRE 608 -208 560 -208
WIRE 656 -208 608 -208
WIRE 800 -208 752 -208
WIRE -400 -192 -400 -208
WIRE 544 -128 544 -160
WIRE 544 -128 400 -128
WIRE -400 -96 -400 -112
WIRE -192 -48 -192 -208
WIRE 608 -32 608 -208
WIRE 608 -32 400 -32
WIRE 80 64 64 64
WIRE 672 64 672 -160
WIRE 672 64 400 64
WIRE 0 160 -16 160
WIRE 80 160 64 160
WIRE 800 160 800 -208
WIRE 800 160 400 160
WIRE 832 160 800 160
WIRE 928 160 912 160
WIRE 992 160 928 160
WIRE 1104 160 992 160
WIRE 992 176 992 160
WIRE 1104 176 1104 160
WIRE -320 256 -432 256
WIRE -288 256 -320 256
WIRE -192 256 -192 16
WIRE -192 256 -224 256
WIRE -112 256 -192 256
WIRE 80 256 -112 256
WIRE 928 256 928 160
WIRE 928 256 400 256
WIRE -432 272 -432 256
WIRE -192 272 -192 256
WIRE 992 272 992 240
WIRE 1104 272 1104 256
WIRE -112 320 -112 256
WIRE -192 352 -192 336
WIRE 0 352 -16 352
WIRE 80 352 64 352
WIRE 528 352 400 352
WIRE -432 368 -432 352
WIRE -112 448 -112 400
WIRE 80 448 -112 448
WIRE 592 448 400 448
WIRE 80 544 64 544
WIRE 656 544 400 544
WIRE 528 592 528 352
WIRE 656 592 656 544
WIRE -320 640 -320 256
WIRE 448 640 -320 640
WIRE 592 640 592 448
WIRE 592 640 544 640
WIRE 640 640 592 640
WIRE 800 640 800 160
WIRE 800 640 736 640
FLAG 64 544 0
FLAG 64 64 0
FLAG -400 -96 0
FLAG -432 368 0
FLAG -16 160 0
FLAG -192 352 0
FLAG -16 352 0
FLAG 992 272 0
FLAG 1104 272 0
FLAG -400 -208 IN1
FLAG -432 256 IN2
FLAG 1104 160 OUT
SYMBOL PowerProducts\\LTC1473L 240 208 R0
SYMATTR InstName U1
SYMBOL voltage -400 -208 R0
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL voltage -432 256 R0
SYMATTR InstName V2
SYMATTR Value 4.8
SYMBOL schottky -208 -48 R0
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -288 272 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 64 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 2000p
SYMBOL cap -208 272 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL ind -128 304 R0
SYMATTR InstName L1
SYMATTR Value 1m
SYMATTR SpiceLine Rpar=100K
SYMBOL cap 64 336 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1µ
SYMBOL nmos 464 -160 R270
WINDOW 0 55 46 VTop 2
WINDOW 3 -9 72 VLeft 2
SYMATTR InstName Q1
SYMATTR Value Si9428DY
SYMBOL nmos 752 -160 M270
WINDOW 0 54 43 VTop 2
WINDOW 3 -16 73 VLeft 2
SYMATTR InstName Q2
SYMATTR Value Si9428DY
SYMBOL res 816 176 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value .04
SYMBOL cap 976 176 R0
SYMATTR InstName C4
SYMATTR Value 100µ
SYMBOL nmos 736 592 R90
WINDOW 0 -15 60 VLeft 2
WINDOW 3 54 46 VTop 2
SYMATTR InstName Q3
SYMATTR Value Si9428DY
SYMBOL nmos 448 592 M90
WINDOW 0 -13 65 VLeft 2
WINDOW 3 56 46 VTop 2
SYMATTR InstName Q4
SYMATTR Value Si9428DY
SYMBOL res 1088 160 R0
SYMATTR InstName Rload
SYMATTR Value 5
TEXT 880 448 Left 2 !.tran 10m startup