Version 4
SHEET 1 880 888
WIRE -1232 144 -1648 144
WIRE -1472 176 -1504 176
WIRE -1232 176 -1248 176
WIRE -1504 208 -1504 176
WIRE -1504 208 -1600 208
WIRE -1136 208 -1504 208
WIRE -880 240 -1088 240
WIRE -848 240 -880 240
WIRE -496 240 -640 240
WIRE -272 240 -496 240
WIRE -1136 288 -1136 208
WIRE -1088 288 -1088 240
WIRE -1648 304 -1648 144
WIRE -1600 304 -1600 288
WIRE -1600 304 -1648 304
WIRE -1504 304 -1504 208
WIRE -1600 320 -1600 304
WIRE -880 320 -880 240
WIRE -416 352 -640 352
WIRE -224 352 -336 352
WIRE -112 352 -144 352
WIRE 16 352 -32 352
WIRE -272 384 -272 240
WIRE -1504 400 -1504 384
WIRE -1504 400 -1600 400
WIRE -1344 400 -1504 400
WIRE -1248 400 -1248 176
WIRE -1248 400 -1264 400
WIRE -1232 400 -1248 400
WIRE -1136 400 -1136 368
WIRE -1136 400 -1152 400
WIRE -1088 400 -1088 368
WIRE -336 400 -336 352
WIRE -304 400 -336 400
WIRE -432 416 -560 416
WIRE -144 416 -144 352
WIRE -144 416 -240 416
WIRE -1136 432 -1136 400
WIRE -304 432 -336 432
WIRE -1504 448 -1504 400
WIRE -496 448 -496 240
WIRE -560 464 -560 416
WIRE -528 464 -560 464
WIRE -1088 480 -1088 464
WIRE -880 480 -880 400
WIRE -880 480 -1088 480
WIRE -432 480 -432 416
WIRE -432 480 -464 480
WIRE -416 480 -432 480
WIRE -336 480 -336 432
WIRE -528 496 -640 496
WIRE -1184 512 -1376 512
WIRE -880 512 -880 480
WIRE -336 528 -336 480
WIRE -1376 544 -1376 512
WIRE -496 640 -496 512
WIRE -336 640 -336 608
WIRE -336 640 -496 640
WIRE -272 640 -272 448
WIRE -272 640 -336 640
WIRE 16 640 16 416
WIRE 16 640 -272 640
WIRE -1376 656 -1376 624
WIRE -1136 656 -1136 528
WIRE -1136 656 -1376 656
WIRE -272 656 -272 640
WIRE -1136 688 -1136 656
FLAG -1136 688 0
FLAG -1504 448 0
FLAG -880 512 0
FLAG -1232 144 Vref
IOPIN -1232 144 Out
FLAG -1472 176 Vcc
IOPIN -1472 176 Out
FLAG -640 240 Vcc
IOPIN -640 240 Out
FLAG -272 656 0
FLAG -720 496 Vfb
IOPIN -720 496 Out
FLAG -640 352 Vref
IOPIN -640 352 Out
FLAG -848 240 Vbat
IOPIN -848 240 Out
FLAG -1232 176 Vfb
IOPIN -1232 176 Out
SYMBOL ind2 -1120 384 R180
WINDOW 0 36 80 Left 2
WINDOW 3 38 56 Left 2
SYMATTR InstName L1
SYMATTR Value 8µ
SYMBOL ind2 -1104 272 R0
SYMATTR InstName L2
SYMATTR Value 8µ
SYMBOL schottky -1072 464 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -134 38 Left 2
SYMATTR InstName D5
SYMATTR Value RBR1L30A
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -1184 432 R0
SYMATTR InstName M1
SYMATTR Value Si7336ADP
SYMBOL voltage -1504 288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage -1376 528 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 12 10u 100n 100n 5u 100u 10)
SYMBOL voltage -880 304 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -1248 384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL res -1616 304 R0
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL res -1616 192 R0
SYMATTR InstName R3
SYMATTR Value 5K
SYMBOL res -1136 384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 5K
SYMBOL res -320 464 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL res -320 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10K
SYMBOL res -128 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL res -320 624 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL Opamps\\LTC6241 -496 480 R0
WINDOW 3 -116 45 Left 2
SYMATTR InstName U3
SYMBOL Opamps\\LTC6241 -272 416 R0
SYMATTR InstName U1
SYMBOL cap 0 352 R0
SYMATTR InstName C1
SYMATTR Value 20p
SYMBOL res -16 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 300
SYMBOL res -736 512 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R10
SYMATTR Value 1K
TEXT -1128 264 Left 2 !K1 L1 L2 1
TEXT -1496 128 Left 2 !.tran 0 1.2m 0 50u uic