Version 4 SHEET 1 3336 1540 WIRE 160 -448 -144 -448 WIRE 448 -448 160 -448 WIRE 656 -448 448 -448 WIRE 736 -448 720 -448 WIRE -368 -416 -464 -416 WIRE 64 -416 -368 -416 WIRE 624 -416 64 -416 WIRE -464 -400 -464 -416 WIRE -144 -400 -144 -448 WIRE 448 -400 448 -448 WIRE -368 -384 -368 -416 WIRE 624 -384 624 -416 WIRE 64 -368 64 -416 WIRE 160 -368 160 -448 WIRE 256 -368 256 -384 WIRE 352 -368 352 -384 WIRE -464 -304 -464 -320 WIRE 0 -304 -320 -304 WIRE 576 -304 416 -304 WIRE -368 -208 -368 -288 WIRE -304 -208 -368 -208 WIRE -144 -208 -144 -336 WIRE -144 -208 -240 -208 WIRE 0 -208 -144 -208 WIRE 448 -208 448 -336 WIRE 448 -208 416 -208 WIRE 496 -208 448 -208 WIRE 624 -208 624 -288 WIRE 624 -208 560 -208 WIRE -624 -112 -768 -112 WIRE -544 -112 -624 -112 WIRE -512 -112 -544 -112 WIRE -400 -112 -432 -112 WIRE -368 -112 -368 -208 WIRE -368 -112 -400 -112 WIRE 0 -112 -368 -112 WIRE 624 -112 624 -208 WIRE 624 -112 416 -112 WIRE 800 -112 624 -112 WIRE 832 -112 800 -112 WIRE 944 -112 912 -112 WIRE 992 -112 944 -112 WIRE 1104 -112 992 -112 WIRE -768 -96 -768 -112 WIRE -624 -96 -624 -112 WIRE -368 -96 -368 -112 WIRE 624 -96 624 -112 WIRE 992 -96 992 -112 WIRE 1104 -96 1104 -112 WIRE 0 -16 -320 -16 WIRE 576 -16 416 -16 WIRE -768 0 -768 -16 WIRE -624 0 -624 -32 WIRE 992 0 992 -32 WIRE 1104 0 1104 -16 WIRE -368 16 -368 0 WIRE 624 16 624 0 WIRE -400 80 -400 -112 WIRE -208 80 -400 80 WIRE -80 80 -128 80 WIRE 0 80 -80 80 WIRE 464 80 416 80 WIRE 528 80 464 80 WIRE 800 80 800 -112 WIRE 800 80 608 80 WIRE -80 96 -80 80 WIRE 464 96 464 80 WIRE -544 176 -544 -112 WIRE -240 176 -544 176 WIRE -208 176 -240 176 WIRE -80 176 -80 160 WIRE -80 176 -128 176 WIRE 0 176 -80 176 WIRE 464 176 464 160 WIRE 464 176 416 176 WIRE 528 176 464 176 WIRE 640 176 608 176 WIRE 944 176 944 -112 WIRE 944 176 640 176 WIRE -80 192 -80 176 WIRE 464 192 464 176 WIRE -240 272 -240 176 WIRE -80 272 -80 256 WIRE -80 272 -240 272 WIRE 0 272 -80 272 WIRE 464 272 464 256 WIRE 464 272 416 272 WIRE 640 272 640 176 WIRE 640 272 464 272 WIRE 432 368 416 368 WIRE -208 464 -272 464 WIRE -96 464 -128 464 WIRE 0 464 -96 464 WIRE 464 464 416 464 WIRE 528 464 464 464 WIRE 640 464 608 464 WIRE -272 480 -272 464 WIRE -96 480 -96 464 WIRE 464 480 464 464 WIRE 640 480 640 464 WIRE -272 560 -272 544 WIRE -96 560 -96 544 WIRE 464 560 464 544 WIRE 640 560 640 544 WIRE -96 656 -112 656 WIRE 0 656 -16 656 WIRE 432 656 416 656 WIRE 528 656 512 656 WIRE 256 736 256 720 WIRE -192 832 -208 832 WIRE -112 832 -112 656 WIRE -112 832 -128 832 WIRE 160 832 160 720 WIRE 160 832 -112 832 WIRE 256 832 256 816 WIRE 256 832 160 832 WIRE 528 832 528 656 WIRE 528 832 256 832 WIRE 64 896 64 720 WIRE 64 896 48 896 WIRE 256 896 64 896 WIRE 352 896 352 720 WIRE 352 896 336 896 WIRE 368 896 352 896 WIRE 464 896 448 896 FLAG 256 -384 0 FLAG 352 -384 0 FLAG 736 -448 0 FLAG -368 16 0 FLAG -96 560 0 FLAG -624 0 0 FLAG -768 0 0 FLAG -768 -112 OUT1 FLAG -464 -416 IN FLAG -464 -304 0 FLAG 464 896 0 FLAG 624 16 0 FLAG 992 0 0 FLAG 1104 0 0 FLAG 1104 -112 OUT0 FLAG 432 368 0 FLAG -16 896 0 FLAG -208 832 0 FLAG -272 560 0 FLAG 464 560 0 FLAG 640 560 0 SYMBOL voltage -464 -416 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 15 SYMBOL cap 656 -432 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL nmos -320 -384 M0 WINDOW 0 -4 30 Right 2 WINDOW 3 -4 63 Right 2 SYMATTR InstName Q1 SYMATTR Value RJK0305DPB SYMBOL nmos -320 -96 M0 WINDOW 0 -7 22 Right 2 WINDOW 3 -4 59 Right 2 SYMATTR InstName Q2 SYMATTR Value RJK0301DPB SYMBOL ind -416 -96 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value .56µ SYMATTR SpiceLine Rser=1.61m SYMBOL cap -240 -224 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL schottky -160 -400 R0 SYMATTR Value CMDSH2-3 SYMATTR InstName D1 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -96 96 R0 SYMATTR InstName C3 SYMATTR Value .22µ SYMBOL res -224 96 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 1.58K SYMBOL cap -112 480 R0 SYMATTR InstName C4 SYMATTR Value 220p SYMBOL cap -640 -96 R0 SYMATTR InstName C5 SYMATTR Value 530µ SYMATTR SpiceLine Rser=5m SYMBOL res -112 672 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL res 240 720 R0 SYMATTR InstName R3 SYMATTR Value 4.99K SYMBOL res 352 880 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 20K SYMBOL res 352 912 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 12.7K SYMBOL nmos 576 -384 R0 SYMATTR InstName Q3 SYMATTR Value RJK0305DPB SYMBOL nmos 576 -96 R0 WINDOW 0 58 30 Left 2 WINDOW 3 64 63 Left 2 SYMATTR InstName Q4 SYMATTR Value RJK0301DPB SYMBOL ind 816 -96 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 1µ SYMATTR SpiceLine Rser=2.3m SYMBOL cap 496 -224 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .1µ SYMBOL schottky 432 -400 R0 SYMATTR Value CMDSH2-3 SYMATTR InstName D2 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 448 96 R0 SYMATTR InstName C7 SYMATTR Value .22µ SYMBOL res 624 96 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R6 SYMATTR Value 2K SYMBOL cap 976 -96 R0 SYMATTR InstName C8 SYMATTR Value 530µ SYMATTR SpiceLine Rser=5m SYMBOL res 528 672 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R7 SYMATTR Value 10K SYMBOL cap 48 880 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C9 SYMATTR Value 1µ SYMBOL cap -128 816 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C10 SYMATTR Value 1µ SYMBOL res -224 192 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R8 SYMATTR Value 1.5K SYMBOL cap -96 192 R0 SYMATTR InstName C11 SYMATTR Value 1µ SYMBOL res 624 160 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 2K SYMBOL cap 448 256 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C12 SYMATTR Value 1µ SYMBOL PowerProducts\\LTC3887 208 176 R0 WINDOW 39 -9 823 Center 2 WINDOW 40 -16 793 Center 2 SYMATTR SpiceLine VIN_ON=5.5 VIN_OFF=5 Vout_0=3.3 Vout_1=1.8 Ilim0_range=0 Ilim1_range=0 OC_limit0=1 OC_limit1=1 Mode_ll=2 Fault_response=0 Retry_delay=.1m SYMATTR SpiceLine2 Freq=500K PHs_0=0 PHs_1=180 Ton0_delay=.3m Ton0_rise=.5m Ton1_delay=.3m Ton1_rise=.5m Toff0_delay=.2m Toff0_fall=.3m Toff1_delay=.2m Toff1_fall=.3m Vout0_range=0 Vout1_range=1 SYMATTR InstName U1 SYMBOL res -112 448 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R10 SYMATTR Value 4.99K SYMBOL cap -288 480 R0 SYMATTR InstName C13 SYMATTR Value 2200p SYMBOL cap 448 480 R0 SYMATTR InstName C14 SYMATTR Value 220p SYMBOL res 512 480 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R11 SYMATTR Value 4.99K SYMBOL cap 624 480 R0 SYMATTR InstName C15 SYMATTR Value 4700p SYMBOL res -784 -112 R0 SYMATTR InstName Rload1 SYMATTR Value .18 SYMBOL res 1088 -112 R0 SYMATTR InstName Rload0 SYMATTR Value .33 TEXT 536 912 Left 2 !.tran 1.2m startup TEXT 208 -472 Bottom 2 ;LTC3887 - Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management\nHigh Efficiency Dual 500kHz 3.3V/1.8V Step-Down Converter\nInput: 6V to 24V Output: 3.3V @ 15A & 1.8V @ 15A TEXT -472 1040 Left 2 ;Notes: \n If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n Component substitution and printed circuit board layout may significantly affect circuit performance or reliability.\n Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts.\n Copyright © 2017 Linear Technology Inc. All rights reserved. TEXT 1104 -152 Center 2 ;3.3V @ 10A TEXT -768 -152 Center 2 ;1.8V @ 10A TEXT 1216 104 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 LTC3887. 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 5.5V; value 1 for 2.75V\n Ilim0_range & Ilim1_range -- set maximum sensed peak current range, with value 0\n for low 50mV, and 1 for high 75mV;\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, 2 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;