Version 4 SHEET 1 3380 996 WIRE 1344 -592 -976 -592 WIRE -656 -544 -928 -544 WIRE 16 -544 -656 -544 WIRE 880 -544 16 -544 WIRE -928 -528 -928 -544 WIRE 512 -512 -208 -512 WIRE -208 -464 -208 -512 WIRE -96 -464 -208 -464 WIRE 112 -464 -16 -464 WIRE -928 -432 -928 -448 WIRE -544 -416 -816 -416 WIRE -448 -416 -480 -416 WIRE -384 -416 -448 -416 WIRE -288 -416 -320 -416 WIRE -128 -416 -288 -416 WIRE 208 -416 -128 -416 WIRE 352 -416 208 -416 WIRE 400 -416 352 -416 WIRE 480 -416 400 -416 WIRE 560 -416 480 -416 WIRE 672 -416 624 -416 WIRE 720 -416 672 -416 WIRE 1040 -416 784 -416 WIRE -656 -384 -656 -544 WIRE 880 -384 880 -544 WIRE -448 -368 -448 -416 WIRE 16 -368 16 -544 WIRE 112 -368 112 -464 WIRE 208 -368 208 -416 WIRE 400 -368 400 -416 WIRE 672 -368 672 -416 WIRE -576 -304 -608 -304 WIRE -208 -304 -208 -464 WIRE -208 -304 -320 -304 WIRE -128 -304 -128 -416 WIRE -96 -304 -128 -304 WIRE 352 -304 352 -416 WIRE 352 -304 320 -304 WIRE 512 -304 512 -512 WIRE 544 -304 512 -304 WIRE 832 -304 800 -304 WIRE 400 -272 400 -288 WIRE -976 -224 -976 -592 WIRE -928 -224 -976 -224 WIRE -816 -224 -816 -416 WIRE -816 -224 -848 -224 WIRE -656 -224 -656 -288 WIRE -656 -224 -816 -224 WIRE -576 -224 -656 -224 WIRE -288 -224 -288 -416 WIRE -288 -224 -320 -224 WIRE 480 -224 480 -416 WIRE 544 -224 480 -224 WIRE 880 -224 880 -288 WIRE 880 -224 800 -224 WIRE 1040 -224 1040 -416 WIRE 1040 -224 880 -224 WIRE 1072 -224 1040 -224 WIRE 1184 -224 1152 -224 WIRE 1232 -224 1184 -224 WIRE 1344 -224 1344 -592 WIRE 1344 -224 1232 -224 WIRE 1456 -224 1344 -224 WIRE -96 -208 -256 -208 WIRE 448 -208 320 -208 WIRE 1232 -208 1232 -224 WIRE 1344 -208 1344 -224 WIRE 1456 -208 1456 -224 WIRE -576 -144 -608 -144 WIRE -256 -144 -256 -208 WIRE -256 -144 -320 -144 WIRE 448 -144 448 -208 WIRE 544 -144 448 -144 WIRE 832 -144 800 -144 WIRE 1232 -112 1232 -144 WIRE 1344 -112 1344 -144 WIRE 1456 -112 1456 -128 WIRE -656 -96 -656 -128 WIRE 880 -96 880 -128 WIRE -448 -64 -448 -80 WIRE 672 -64 672 -80 WIRE -816 -16 -816 -224 WIRE -304 -16 -816 -16 WIRE -176 -16 -224 -16 WIRE -96 -16 -176 -16 WIRE 368 -16 320 -16 WIRE 432 -16 368 -16 WIRE 1040 -16 1040 -224 WIRE 1040 -16 512 -16 WIRE -176 0 -176 -16 WIRE 368 0 368 -16 WIRE -976 80 -976 -224 WIRE -176 80 -176 64 WIRE -176 80 -976 80 WIRE -96 80 -176 80 WIRE 368 80 368 64 WIRE 368 80 320 80 WIRE 1184 80 1184 -224 WIRE 1184 80 368 80 WIRE -976 176 -976 80 WIRE -96 176 -976 176 WIRE 656 176 320 176 WIRE 1184 176 1184 80 WIRE 1184 176 656 176 WIRE 336 272 320 272 WIRE -96 368 -128 368 WIRE 352 368 320 368 WIRE 384 368 352 368 WIRE 656 368 656 176 WIRE 384 384 384 368 WIRE -128 400 -128 368 WIRE 352 400 352 368 WIRE 352 400 -128 400 WIRE -208 464 -208 -304 WIRE -96 464 -208 464 WIRE 384 464 384 448 WIRE 384 464 320 464 WIRE 656 464 656 432 WIRE 656 464 384 464 WIRE -96 656 -128 656 WIRE 352 656 320 656 WIRE 384 656 352 656 WIRE -128 688 -128 656 WIRE 352 688 352 656 WIRE 352 688 -128 688 WIRE 384 720 384 656 WIRE -208 832 -208 464 WIRE -32 832 -32 816 WIRE -32 832 -208 832 WIRE 256 832 256 816 WIRE 384 832 384 784 WIRE 384 832 256 832 WIRE -32 848 -32 832 WIRE 64 848 64 816 WIRE 160 848 160 816 WIRE 256 848 256 832 WIRE 384 848 384 832 WIRE -32 928 -32 912 WIRE 64 928 64 912 FLAG 160 848 0 FLAG -928 -432 0 FLAG -448 -64 0 FLAG -656 -96 0 FLAG 1232 -112 0 FLAG 1344 -112 0 FLAG 1456 -112 0 FLAG 1456 -224 OUT FLAG -928 -544 IN FLAG 672 -64 0 FLAG 880 -96 0 FLAG 384 848 0 FLAG 400 -272 0 FLAG 256 848 0 FLAG 336 272 0 FLAG -32 928 0 FLAG 64 928 0 SYMBOL voltage -928 -544 R0 SYMATTR InstName V1 SYMATTR Value 32 SYMBOL PowerProducts\\LTC4449 -448 -224 M0 SYMATTR InstName U1 SYMBOL nmos -608 -384 M0 SYMATTR InstName Q1 SYMATTR Value BSC050N04LS SYMBOL ind -832 -208 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value .2µ SYMATTR SpiceLine Rser=.3m Rpar=5K SYMBOL res -320 0 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 3.09K SYMBOL cap -192 0 R0 SYMATTR InstName C1 SYMATTR Value .22µ SYMBOL cap 1216 -208 R0 WINDOW 123 26 65 Left 2 WINDOW 3 41 36 Left 2 SYMATTR Value2 X4 SYMATTR Value 470µ SYMATTR InstName C2 SYMATTR SpiceLine Rser=25m SYMBOL cap 1328 -208 R0 WINDOW 123 21 69 Left 2 WINDOW 3 44 37 Left 2 SYMATTR Value2 X2 SYMATTR Value 100µ SYMATTR InstName C3 SYMATTR SpiceLine Rser=3m SYMBOL schottky -320 -432 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value 1N5818 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -480 -432 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value .22µ SYMBOL cap 640 432 M180 WINDOW 39 29 7 Left 2 WINDOW 3 42 35 Left 2 WINDOW 0 22 59 Left 2 SYMATTR SpiceLine Rser=1.07K SYMATTR Value 200p SYMATTR InstName C5 SYMBOL nmos -608 -224 M0 SYMATTR InstName Q2 SYMATTR Value BSC016N04LS SYMBOL PowerProducts\\LTC4449 672 -224 R0 SYMATTR InstName U3 SYMBOL ind 1056 -208 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value .2µ SYMATTR SpiceLine Rser=.3m Rpar=5K SYMBOL res 528 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 3.09K SYMBOL cap 352 0 R0 SYMATTR InstName C6 SYMATTR Value .22µ SYMBOL schottky 560 -432 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D2 SYMATTR Value 1N5818 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 720 -432 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value .22µ SYMBOL cap 368 384 R0 WINDOW 39 24 63 Left 2 WINDOW 3 35 34 Left 2 SYMATTR SpiceLine Rser=100K Cpar=11p SYMATTR Value 270p SYMATTR InstName C8 SYMBOL cap 368 720 R0 SYMATTR InstName C9 SYMATTR Value 100p SYMBOL voltage 400 -384 R0 SYMATTR InstName V2 SYMATTR Value 5 SYMBOL res 1440 -224 R0 SYMATTR InstName Rload SYMATTR Value 82.5m SYMBOL nmos 832 -384 R0 SYMATTR InstName Q3 SYMATTR Value BSC050N04LS SYMBOL nmos 832 -224 R0 SYMATTR InstName Q4 SYMATTR Value BSC016N04LS SYMBOL cap -48 848 R0 SYMATTR InstName C10 SYMATTR Value 2.2µ SYMBOL cap 48 848 R0 SYMATTR InstName C11 SYMATTR Value 1µ SYMBOL res 0 -480 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 2K SYMBOL PowerProducts\\LTC3882 112 224 R0 SYMATTR InstName U2 TEXT 448 864 Left 2 !.tran 1m startup TEXT 1584 -224 Left 2 ;Please read the following notes carefully, since the model presents different user interface\nthan the real part does.\n \n(1) All PMBus communication and memory address related functions and pins are not modeled. \n \n(2) Changes to all parameter values during the simulation running will not be in effect, unless the\nsimulation is stopped and restarted. This is different from the operation of the part, which will\n respond to the commanded changes while running. \n \n(3) Share_clk is not modeled. The default time reference of LTspice is used as the common time \nbase for all time related parameters.\n \n(4) The following parameters can be defined, by right-clicking the symbol of LTC3882. Different \nnomenclature from the datasheet is adopted here. If any value of these parameters are set beyond \nthe scope discribed in the datasheet, the resulting simulation outcomes are not meaningful.\n \n Freq -- in Hz, sets switching frequency as one of values of 250K, 300K, 350K, \n 400K, 450K, 500K, 600K, 750K, 900K, 1000K, 1250K. FREQ_CFG pin needs to float \n (or short to VDD25), to make the value be in effect;\n PHAS_0 & PHAS_1 -- in degree, set phase angle related to SYNC signal. \n Certain combinations are restricted as in datasheet. PHAS_CFG \n pin needs to float (or short to VDD25), to make the value be in effect;\n Ton0_delay & Ton0_rise; Ton1_delay & Ton1_rise -- in sec, set delay and soft-start timers for \n channel0 and channel1. Initialization time is not modeled;\n Toff0_delay & Toff0_fall; Toff1_delay & Toff1_fall -- in sec, set delay and soft-off timers for \n channel0 and channel1;\n Vout_0 & Vout_1 -- in volt, set output voltages respectively. Vout#_CFG pin needs to float \n (or short to VDD25), to make the value be in effect;\n Vout0_range & Vout1_range -- set maximum output range, with value 0\n for 5.5V; value 1 for 2.75V;\n Iout0_fault & Iout1_fault -- in Amper, set maximum inductor peak current value, OC will be triggered \n when the value is exceeded;\n Iout0_warn & Iout1_warn -- in aMper, set the average load current maximum value, which will be used \n with Vout#_AVP to define the AVP operation;\n Iout0_gain & Iout1_gain -- in Ohm, set sensing resistor or inductor DCR values used in the circuit;\n Vout0_AVP & Vout1_AVP -- set the maximum value reference will reduce at Iout#_warn level:\n PWM0_Protocol & PWM1_Protocol-- sets TG/BG output rules: 0 for 3-state PWM output; 1 for 2-state PWM output with active-high EN;\n 2 for 2-state PWM output with active-low open drain disable; 4 for indenpendent TG/BG outputs.