* Z:\home\khalils\Downloads\files\data\raw_asc\LTM4739.asc
* Generated by LTspice 26.0.1 for Windows.
* Please read the following notes carefully since the model behaves differently from the user interface for the LTM4739.\n \n(1) PMBus communication and memory address related functions and pins are not modeled.\n \n(2) Changes to parameter values while the simulation is running will not take effect unless the simulation is stopped\nand restarted. This is different from the way the part operates which will respond to the changes while running.\n \n(3) The following parameters can be defined by right-clicking on the LTM4739 symbol.\nThe nomenclature used here differs from the one in the data sheet. If any value of these parameters is set beyond the\nscope described in the data sheet, the resulting simulation will not be meaningful.\n \n PMBUS_EN -- If PMBUS_EN = 0, then the pin-strap resistor values at PGM0 pin and PGM1 pin will be respected.\n PGM0 resistor sets the POCP value.\n PGM1 resistor sets the switching frequency and the six predefined scenarios.\n If PMBUS_EN = 1, then the following parameters will be respected: Freq, AMS, RVGA, POCP;\n Vref -- in volt, sets reference voltage, in the range of [0.4V, 0.8V];\n Freq -- in Hz, sets switching frequency as one of values of 500k, 600k, 750k, 1000k, 1200k, 2000k.\n PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM1 is respected;\n AMS -- If AMS = 0, then the AMS function is disabled.\n If AMS = 1, then the AMS function is enabled.\n PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM1 is respected;\n slope_comp -- in ampere, sets the slope compensation as one of the values of 840nA, 1260nA, 1680nA, 2100nA,\n 2520nA, 2940nA, 3360nA, 3780nA;\n RVGA -- in ohm, sets the voltage loop gain as one of the values of 10.1k, 11.1k, 15.7k, 22.7k, 26.8k, 31.3k, 37.3k,\n 44.8k, 52.9k, 62.3k, 75k, 105.1k.\n PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM1 is respected;\n POCP -- in ampere, sets the peak over-current protection limit as one of the values of 9A, 11A, 13A, 15A.\n PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM0 is respected;\n voltage_loop_zero -- in Hz, sets the voltage loop zero frequency as one of the values of 3.22k, 5k, 7.6k, 8.85k,\n 10.6k, 12.5k, 15.2k, 17.7k;\n tss -- in ms, sets the soft-startup time as one of the two values of 1ms (default) or 3ms;\n DCM_EN -- sets the DCM operation of LTM4739:\n DCM_EN = 0: (default) Device is always at forced continuous conduction mode.\n DCM_EN = 1: DCM operation is enabled at light load.
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LTM4739.asy)
RFB2 N001 0 3.01k
R3 N002 0 200
XU1 0 VCC NC_01 NC_02 IN EN N002 N003 MP_03 NC_04 PGOOD 0 N001 0 MP_05 OUT LTM4739 PMBUS_EN=0 Vref=0.5 Freq=500kHz AMS=1 slope_comp=3.78u RVGA=15.7k POCP=15 voltage_loop_zero=7.6k tss=1m DCM_EN=0 ;pnba AGND)VCC)AVDD)BIAS)VIN)EN)PGM0)PGM1))SW)PGOOD)GND)SENSE+)SENSE-))VOUT
RFB1 OUT N001 3.01k
R2 N003 0 309
Cout OUT 0 100 x4 Rser=3.5m
R1 OUT 0 0.1
V2 EN 0 1.8
R4 VCC PGOOD 100k
V1 IN 0 12
.tran 1.8m startup
.lib LTM4739.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 3344 1992
WIRE 944 48 624 48
WIRE 1376 48 1312 48
WIRE 1520 48 1376 48
WIRE 1584 48 1520 48
WIRE 1648 48 1584 48
WIRE 624 64 624 48
WIRE 1376 64 1376 48
WIRE 1520 112 1520 48
WIRE 1648 112 1648 48
WIRE 624 160 624 144
WIRE 864 160 768 160
WIRE 944 160 864 160
WIRE 1376 160 1376 144
WIRE 1376 160 1312 160
WIRE 1376 176 1376 160
WIRE 1520 240 1520 176
WIRE 1648 240 1648 192
WIRE 1648 240 1520 240
WIRE 768 256 768 240
WIRE 1648 256 1648 240
WIRE 1376 272 1376 256
WIRE 1376 272 1312 272
WIRE 1376 288 1376 272
WIRE 896 384 768 384
WIRE 944 384 896 384
WIRE 768 400 768 384
WIRE 768 496 768 480
WIRE 896 496 768 496
WIRE 944 496 896 496
WIRE 944 608 768 608
WIRE 1344 608 1312 608
WIRE 768 640 768 608
WIRE 944 720 864 720
WIRE 1344 720 1312 720
WIRE 768 736 768 720
WIRE 864 752 864 720
WIRE 864 848 864 832
SYMBOL res 752 384 R0
SYMATTR InstName R4
SYMATTR Value 100k
SYMBOL res 1360 48 R0
SYMATTR InstName RFB1
SYMATTR Value 3.01k
SYMBOL cap 1504 112 R0
WINDOW 123 28 80 Left 2
SYMATTR Value2 x4
SYMATTR SpiceLine Rser=3.5m
SYMATTR InstName Cout
SYMATTR Value 100
SYMBOL res 848 736 R0
SYMATTR InstName R2
SYMATTR Value 309
SYMBOL voltage 624 48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 34 24 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res 1360 160 R0
SYMATTR InstName RFB2
SYMATTR Value 3.01k
SYMBOL LTM4739 1136 192 R0
SYMATTR InstName U1
SYMBOL res 1632 96 R0
SYMATTR InstName R1
SYMATTR Value 0.1
SYMBOL voltage 768 144 R0
WINDOW 0 35 52 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 1.8
SYMBOL res 752 624 R0
SYMATTR InstName R3
SYMATTR Value 200
FLAG 624 160 0
FLAG 864 848 0
FLAG 1584 48 OUT
FLAG 1376 288 0
FLAG 1648 256 0
FLAG 624 48 IN
FLAG 768 736 0
FLAG 768 256 0
FLAG 864 160 EN
FLAG 896 496 PGOOD
FLAG 896 384 VCC
FLAG 1344 608 0
FLAG 1344 720 0
TEXT 1496 680 Left 2 !.tran 1.8m startup
TEXT 1768 32 Left 2 ;Please read the following notes carefully since the model behaves differently from the user interface for the LTM4739.\n \n(1) PMBus communication and memory address related functions and pins are not modeled.\n \n(2) Changes to parameter values while the simulation is running will not take effect unless the simulation is stopped\nand restarted. This is different from the way the part operates which will respond to the changes while running.\n \n(3) The following parameters can be defined by right-clicking on the LTM4739 symbol.\nThe nomenclature used here differs from the one in the data sheet. If any value of these parameters is set beyond the\nscope described in the data sheet, the resulting simulation will not be meaningful.\n \n     PMBUS_EN -- If PMBUS_EN = 0, then the pin-strap resistor values at PGM0 pin and PGM1 pin will be respected.\n                                    PGM0 resistor sets the POCP value.\n                                    PGM1 resistor sets the switching frequency and the six predefined scenarios.\n                            If PMBUS_EN = 1, then the following parameters will be respected: Freq, AMS, RVGA, POCP;\n     Vref -- in volt, sets reference voltage, in the range of [0.4V, 0.8V];\n     Freq -- in Hz, sets switching frequency as one of values of 500k, 600k, 750k, 1000k, 1200k, 2000k.\n                     PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM1 is respected;\n     AMS -- If AMS = 0, then the AMS function is disabled.\n                 If AMS = 1, then the AMS function is enabled.\n                     PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM1 is respected;\n     slope_comp -- in ampere, sets the slope compensation as one of the values of 840nA, 1260nA, 1680nA, 2100nA,\n                             2520nA, 2940nA, 3360nA, 3780nA;\n     RVGA -- in ohm, sets the voltage loop gain as one of the values of 10.1k, 11.1k, 15.7k, 22.7k, 26.8k, 31.3k, 37.3k,\n                   44.8k, 52.9k, 62.3k, 75k, 105.1k.\n                     PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM1 is respected;\n     POCP -- in ampere, sets the peak over-current protection limit as one of the values of 9A, 11A, 13A, 15A.\n                     PMBUS_EN needs to be set as 1, to make the value be in effect, otherwise, PGM0 is respected;\n     voltage_loop_zero -- in Hz, sets the voltage loop zero frequency as one of the values of 3.22k, 5k, 7.6k, 8.85k,\n                                        10.6k, 12.5k, 15.2k, 17.7k;\n     tss -- in ms, sets the soft-startup time as one of the two values of 1ms (default) or 3ms;\n     DCM_EN -- sets the DCM operation of LTM4739:\n                        DCM_EN = 0: (default) Device is always at forced continuous conduction mode.\n                        DCM_EN = 1: DCM operation is enabled at light load.