Version 4 SHEET 1 3120 1720 WIRE 720 -544 720 -560 WIRE 720 -464 720 -480 WIRE 720 -464 336 -464 WIRE 912 -464 720 -464 WIRE 816 -448 144 -448 WIRE 1120 -448 816 -448 WIRE 1344 -448 1120 -448 WIRE 336 -432 336 -464 WIRE 912 -432 912 -464 WIRE 1344 -432 1344 -448 WIRE 144 -416 144 -448 WIRE 1120 -416 1120 -448 WIRE 432 -400 432 -416 WIRE 528 -400 528 -416 WIRE 624 -400 624 -416 WIRE 720 -400 720 -464 WIRE 816 -400 816 -448 WIRE 368 -336 192 -336 WIRE 1072 -336 880 -336 WIRE 1344 -336 1344 -352 WIRE 144 -240 144 -320 WIRE 224 -240 144 -240 WIRE 336 -240 336 -368 WIRE 336 -240 288 -240 WIRE 368 -240 336 -240 WIRE 912 -240 912 -368 WIRE 912 -240 880 -240 WIRE 1040 -240 912 -240 WIRE 1120 -240 1120 -320 WIRE 1120 -240 1104 -240 WIRE -192 -144 -304 -144 WIRE -96 -144 -192 -144 WIRE -64 -144 -96 -144 WIRE 64 -144 16 -144 WIRE 144 -144 144 -240 WIRE 144 -144 64 -144 WIRE 368 -144 144 -144 WIRE 1120 -144 1120 -240 WIRE 1120 -144 880 -144 WIRE 1184 -144 1120 -144 WIRE 1232 -144 1184 -144 WIRE 1344 -144 1312 -144 WIRE 1392 -144 1344 -144 WIRE 1504 -144 1392 -144 WIRE -304 -128 -304 -144 WIRE -192 -128 -192 -144 WIRE 144 -128 144 -144 WIRE 1120 -128 1120 -144 WIRE 1392 -128 1392 -144 WIRE 1504 -128 1504 -144 WIRE 368 -48 192 -48 WIRE 1072 -48 880 -48 WIRE -304 -32 -304 -48 WIRE -192 -32 -192 -64 WIRE 1392 -32 1392 -64 WIRE 1504 -32 1504 -48 WIRE 144 -16 144 -32 WIRE 1120 -16 1120 -32 WIRE 64 48 64 -144 WIRE 176 48 64 48 WIRE 304 48 256 48 WIRE 368 48 304 48 WIRE 944 48 880 48 WIRE 1024 48 944 48 WIRE 1184 48 1184 -144 WIRE 1184 48 1104 48 WIRE 304 64 304 48 WIRE 944 64 944 48 WIRE -96 144 -96 -144 WIRE 304 144 304 128 WIRE 304 144 -96 144 WIRE 368 144 304 144 WIRE 944 144 944 128 WIRE 944 144 880 144 WIRE 1344 144 1344 -144 WIRE 1344 144 944 144 WIRE -96 240 -96 144 WIRE 368 240 -96 240 WIRE 1344 240 1344 144 WIRE 1344 240 880 240 WIRE 368 336 336 336 WIRE 912 336 880 336 WIRE 272 432 240 432 WIRE 368 432 336 432 WIRE 912 432 880 432 WIRE 1008 432 976 432 WIRE 272 528 240 528 WIRE 368 528 336 528 WIRE 912 528 880 528 WIRE 1008 528 976 528 WIRE 144 624 112 624 WIRE 288 624 224 624 WIRE 368 624 288 624 WIRE 912 624 880 624 WIRE 1024 624 912 624 WIRE 1136 624 1104 624 WIRE 64 720 32 720 WIRE 176 720 144 720 WIRE 368 720 176 720 WIRE 1024 720 880 720 WIRE 1040 720 1024 720 WIRE 1152 720 1120 720 WIRE 176 768 176 720 WIRE 288 768 288 624 WIRE 912 768 912 624 WIRE 1024 768 1024 720 WIRE 176 896 176 848 WIRE 288 896 288 848 WIRE 288 896 176 896 WIRE 720 896 720 880 WIRE 720 896 288 896 WIRE 912 896 912 848 WIRE 912 896 720 896 WIRE 1024 896 1024 848 WIRE 1024 896 912 896 WIRE 1056 896 1024 896 WIRE 1152 896 1120 896 WIRE 432 912 432 880 WIRE 528 912 528 880 WIRE 816 912 816 880 WIRE 432 1008 432 992 WIRE 528 1008 528 992 WIRE 528 1008 432 1008 WIRE 624 1008 624 880 WIRE 624 1008 528 1008 WIRE 816 1008 816 992 WIRE 816 1008 624 1008 WIRE 880 1008 816 1008 WIRE 960 1008 944 1008 FLAG 624 -416 0 FLAG 528 -416 0 FLAG 720 -560 0 FLAG 1120 -16 0 FLAG 1392 -32 0 FLAG 1504 -32 0 FLAG 1504 -144 OUT1 FLAG 1344 -448 IN FLAG 1344 -336 0 FLAG 144 -16 0 FLAG -192 -32 0 FLAG -304 -32 0 FLAG -304 -144 OUT0 FLAG 432 -416 0 FLAG 336 336 0 FLAG 912 336 0 FLAG 240 432 0 FLAG 240 528 0 FLAG 1008 432 0 FLAG 1008 528 0 FLAG 960 1008 0 FLAG 112 624 0 FLAG 32 720 0 FLAG 1136 624 0 FLAG 1152 720 0 FLAG 1152 896 0 SYMBOL voltage 1344 -448 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL cap 704 -544 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL nmos 1072 -416 R0 WINDOW 0 59 24 Left 2 WINDOW 3 56 66 Left 2 SYMATTR InstName Q1 SYMATTR Value RJK0305DPB SYMBOL nmos 1072 -128 R0 WINDOW 0 0 2 Right 2 WINDOW 3 25 107 Right 2 SYMATTR InstName Q2 SYMATTR Value RJK0301DPB SYMBOL cap 1040 -256 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL schottky 896 -432 R0 SYMATTR Value CMDSH2-3 SYMATTR InstName D1 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 928 64 R0 SYMATTR InstName C3 SYMATTR Value .22µ SYMBOL res 1120 64 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 931 SYMBOL cap 1376 -128 R0 WINDOW 123 28 56 Left 2 WINDOW 3 37 32 Left 2 SYMATTR Value2 x2 SYMATTR Value 330µ SYMATTR InstName C5 SYMATTR SpiceLine Rser=5m SYMBOL res 1488 -144 R0 SYMATTR InstName R2 SYMATTR Value .033 SYMBOL nmos 192 -416 M0 WINDOW 0 38 -9 Right 2 WINDOW 3 42 99 Right 2 SYMATTR InstName Q3 SYMATTR Value RJK0305DPB SYMBOL nmos 192 -128 M0 WINDOW 0 -3 20 Right 2 WINDOW 3 28 103 Right 2 SYMATTR InstName Q4 SYMATTR Value RJK0301DPB SYMBOL ind 32 -128 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 WINDOW 39 -51 49 VTop 2 SYMATTR InstName L2 SYMATTR Value .33µ SYMATTR SpiceLine Rser=.32m SYMBOL cap 288 -256 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value .1µ SYMBOL schottky 352 -432 M0 SYMATTR Value CMDSH2-3 SYMATTR InstName D2 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 288 64 R0 SYMATTR InstName C8 SYMATTR Value .22µ SYMBOL res 160 64 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R11 SYMATTR Value 931 SYMBOL cap -208 -128 R0 WINDOW 123 25 59 Left 2 WINDOW 3 35 34 Left 2 SYMATTR Value2 x2 SYMATTR Value 330µ SYMATTR InstName C9 SYMATTR SpiceLine Rser=5m SYMBOL res -320 -144 R0 SYMATTR InstName R12 SYMATTR Value .05 SYMBOL PowerProducts\\LTC3884 624 240 M0 SYMATTR SpiceLine VIN_ON=5.5 VIN_OFF=5 Vout_0=1.5 Vout_1=1.05 Ilim0_range=1 Ilim1_range=1 OC_limit0=1 OC_limit1=1 Mode_ll=1 Fault_response=0 Retry_delay=.1m gm0=3m gm1=3m Rth0=3K Rth1=3K LowDCR=1 SYMATTR InstName U2 SYMBOL cap 272 416 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C12 SYMATTR Value 220p SYMBOL cap 272 512 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C13 SYMATTR Value 4700p SYMBOL cap 976 416 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C14 SYMATTR Value 220p SYMBOL cap 976 512 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C15 SYMATTR Value 2200p SYMBOL res 800 896 R0 SYMATTR InstName R14 SYMATTR Value 10K SYMBOL res 448 896 M0 SYMATTR InstName R15 SYMATTR Value 10K SYMBOL res 512 896 R0 SYMATTR InstName R16 SYMATTR Value 4.99K SYMBOL cap 880 992 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 1µ SYMBOL res 128 608 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R17 SYMATTR Value 17.8K SYMBOL res 272 864 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R18 SYMATTR Value 20K SYMBOL res 160 736 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R19 SYMATTR Value 5.76K SYMBOL res 160 752 R0 SYMATTR InstName R20 SYMATTR Value 24.9K SYMBOL res 1120 608 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R21 SYMATTR Value 7.32K SYMBOL res 896 864 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R22 SYMATTR Value 24.9K SYMBOL res 1024 736 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R23 SYMATTR Value 11.3K SYMBOL res 1008 752 R0 SYMATTR InstName R24 SYMATTR Value 24.9K SYMBOL cap 1056 880 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 1µ SYMBOL ind 1216 -128 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 WINDOW 39 -51 49 VTop 2 SYMATTR InstName L1 SYMATTR Value .33µ SYMATTR SpiceLine Rser=.32m TEXT 1400 952 Right 2 !.tran 1.2m startup TEXT 1320 312 Left 0 ;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 LTC3880. 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 VIN_ON & VIN_OFF -- in volts, set the unit start/stop input voltages;\n Freq -- in Hz, sets switching frequency as one of values of 250K, 350K, \n 425K, 500K, 575K, 650K, 750K, 1000K. FREQ_CFG pin needs to float \n (or short to VDD25), to make the value be in effect;\n PHs_0 & PHs_1 -- in degree, set phase angle related to SYNC signal. \n Certain combinations are restricted as in datasheet. FREQ_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;\n Vout0_range & Vout1_range -- set maximum output range, with value 0\n for 4.096V (CH0) and 5.5V (CH1); value 1\n for 2.75V\n Ilim0_range & Ilim1_range -- set maximum sensed peak current range, with value 0\n for low (45.14mV), and 1 for high (81.25mV);\n OC_limit0 & OC_limit1 -- set ratio of peak current limit to the maximum value defined\n by Ilimit_range. It must be one of values: 0.5, 0.572, 0.642, \n 0.714, 0.786, 0.858, 0.928, 1;\n Mode_II -- sets light load operation mode: 0 for discontinuous, 1 for forced continuous;\n Fault_response -- sets the response mode of the unit to occuring faults:\n 0 for ignore, 1 for latch up, 2 for Hiccup after Retry_delay time;\n Retry_delay -- in sec, sets the timer before the unit turns on after a fault;\n gm -- transconductance of the error amplifier. It must be between 1m mho and 5.73m mho;\n Rth -- Compensation resistor. It must be set between 0k ohms and 62k ohms;\n LowDCR -- set to 1 if DCR is below 1m ohm and make RC = L/(5*DCR), set to 0 if DCR is above 1m\n ohm and make RC = L/DCR.