Version 4 SHEET 1 1208 680 WIRE 64 -48 -32 -48 WIRE 176 -48 64 -48 WIRE 272 -48 256 -48 WIRE -32 -32 -32 -48 WIRE 176 0 176 -48 WIRE 272 0 272 -48 WIRE -32 64 -32 48 WIRE 64 64 64 -48 WIRE 80 64 64 64 WIRE 416 64 368 64 WIRE 576 64 416 64 WIRE 688 64 576 64 WIRE 784 64 688 64 WIRE 416 80 416 64 WIRE 784 80 784 64 WIRE 688 96 688 64 WIRE -16 160 -32 160 WIRE 64 160 48 160 WIRE 80 160 64 160 WIRE 416 160 416 144 WIRE 416 160 368 160 WIRE 576 160 576 64 WIRE 688 176 688 160 WIRE 784 176 784 160 WIRE 64 256 64 160 WIRE 80 256 64 256 WIRE 576 256 576 240 WIRE 576 256 368 256 WIRE 576 272 576 256 WIRE -16 352 -32 352 WIRE 80 352 64 352 WIRE 416 352 368 352 WIRE 496 352 480 352 WIRE 576 368 576 352 WIRE 176 432 176 416 WIRE 272 432 272 416 FLAG 176 432 0 FLAG 272 432 0 FLAG -32 160 0 FLAG -32 64 0 FLAG -32 352 0 FLAG 496 352 0 FLAG 576 368 0 FLAG 688 176 0 FLAG 784 176 0 FLAG 784 64 OUT FLAG -32 -48 IN SYMBOL voltage -32 -48 R0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL ind 160 -32 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 6.8µ SYMATTR SpiceLine Rser=10m SYMBOL cap 48 144 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 4.7µ SYMBOL res 80 336 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 57.6K SYMBOL cap 416 368 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 WINDOW 39 -24 85 VBottom 2 SYMATTR InstName C2 SYMATTR Value 390p SYMATTR SpiceLine Rser=210K Cpar=10p SYMBOL cap 400 80 R0 SYMATTR InstName C3 SYMATTR Value .1µ SYMBOL res 560 256 R0 SYMATTR InstName R2 SYMATTR Value 113K SYMBOL res 560 144 R0 SYMATTR InstName R3 SYMATTR Value 1.02Meg SYMBOL cap 672 96 R0 SYMATTR InstName C4 SYMATTR Value 22µ SYMATTR SpiceLine V=25 Irms=0 Rser=0.003 Lser=0 mfg="TDK" pn="C575OX5RIE226M" type="X5R" SYMBOL res 768 64 R0 SYMATTR InstName Rload SYMATTR Value 30 SYMBOL PowerProducts\\LTC3121 224 208 R0 SYMATTR InstName U1 TEXT 696 288 Left 2 !.tran 3m startup TEXT 696 320 Left 2 !.softstart .2 TEXT 392 -72 Left 2 ;Note: Parameter "softstart", with the valid range of [0.1, 1],\n can be used to reduce the internal startup timer,\n for the purpose of simulation. The part has nominal \n internal startup time of 10mSec.