Version 4
SHEET 1 1864 700
WIRE 176 -16 64 -16
WIRE 496 -16 176 -16
WIRE 656 -16 496 -16
WIRE 992 -16 656 -16
WIRE 64 0 64 -16
WIRE 496 0 496 -16
WIRE 176 80 176 -16
WIRE 992 80 992 -16
WIRE 64 96 64 80
WIRE 496 96 496 80
WIRE 656 96 656 -16
WIRE 400 160 384 160
WIRE 944 160 752 160
WIRE 400 224 384 224
WIRE 800 224 752 224
WIRE 992 224 992 176
WIRE 992 224 800 224
WIRE 1056 224 992 224
WIRE 1104 224 1056 224
WIRE 1232 224 1184 224
WIRE 1344 224 1232 224
WIRE 1472 224 1344 224
WIRE 1344 240 1344 224
WIRE 1472 240 1472 224
WIRE 1056 256 1056 224
WIRE 1232 272 1232 224
WIRE 320 288 304 288
WIRE 400 288 384 288
WIRE 800 288 752 288
WIRE 992 336 992 224
WIRE 1056 336 1056 320
WIRE 1344 336 1344 304
WIRE 1472 336 1472 320
WIRE 400 352 384 352
WIRE 800 352 752 352
WIRE 1232 368 1232 352
WIRE 1232 368 1152 368
WIRE 1232 384 1232 368
WIRE 224 416 208 416
WIRE 304 416 288 416
WIRE 400 416 384 416
WIRE 944 416 752 416
WIRE 992 448 992 432
WIRE 176 480 176 160
WIRE 400 480 176 480
WIRE 1152 480 1152 368
WIRE 1152 480 752 480
WIRE 1232 480 1232 464
WIRE 800 496 800 352
WIRE 496 576 496 544
WIRE 656 576 656 544
WIRE 800 576 800 560
FLAG 496 576 0
FLAG 656 576 0
FLAG 992 448 0
FLAG 800 576 0
FLAG 1056 336 0
FLAG 1472 336 0
FLAG 1232 480 0
FLAG 1344 336 0
FLAG 208 416 0
FLAG 64 96 0
FLAG 304 288 0
FLAG 1472 224 OUT
FLAG 64 -16 IN
SYMBOL RES 480 -16 R0
SYMATTR InstName R1
SYMATTR Value 1.4Meg
SYMBOL res 1216 256 R0
SYMATTR InstName R2
SYMATTR Value 30.1K
SYMBOL res 1216 368 R0
SYMATTR InstName R3
SYMATTR Value 14K
SYMBOL schottky 784 352 M180
WINDOW 0 38 34 Left 2
WINDOW 3 28 5 Left 2
SYMATTR InstName D1
SYMATTR Value MBR0530L
SYMBOL polcap 784 496 R0
SYMATTR InstName C1
SYMATTR Value 4.7µ
SYMBOL schottky 1040 320 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value MBRS340
SYMBOL nmos 944 80 R0
SYMATTR InstName Q1
SYMATTR Value Si4884DY
SYMBOL ind 1088 240 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 1.8µ
SYMATTR SpiceLine Rpar=100K
SYMBOL polcap 1328 240 R0
WINDOW 40 32 56 Left 2
WINDOW 3 34 34 Left 2
SYMATTR SpiceLine2 x2
SYMATTR Value 180µ
SYMATTR InstName C2
SYMATTR SpiceLine Rser=.05
SYMBOL res 400 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 20K
SYMBOL cap 288 400 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 500p
SYMBOL res 160 64 R0
SYMATTR InstName R5
SYMATTR Value 3.3K
SYMBOL VOLTAGE 64 -16 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL cap 384 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value .001µ
SYMBOL POWERPRODUCTS\\LTC1778 576 320 R0
WINDOW 0 116 -248 Center 2
SYMATTR InstName U1
SYMBOL cap 784 224 R0
WINDOW 0 38 19 Left 2
WINDOW 3 33 52 Left 2
SYMATTR InstName C5
SYMATTR Value .22µ
SYMBOL nmos 944 336 R0
SYMATTR InstName Q2
SYMATTR Value Si4874DY
SYMBOL res 1456 224 R0
SYMATTR InstName Rload
SYMATTR Value .3
TEXT 1016 528 Left 2 !.tran 2.5m startup