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Calculation: Sync Buck Converter

Enter Opearting Conditions
Vin [V_DC]: Vout [V_DC]: Iout [A_DC]: fsw [Hz]: N1 [Q1 // FETs]:
N2 [Q2 // FETs]:

Enter Thermal Parameters
TA [°C]: RthCA_Q1 [°C/W]: RthCA_Q2 [°C/W]: TempCoeff [Rdson-TC Default]:

Enter Gate Driver Parameters
Vgdrive [V]: Rg_Ext [Ω]: Rpu [Ω]: Rpd [Ω]: Tdead [s]:

Other Circuit Parameters
Lout [H]: DCRout [Ω]: Cin [F]: ESRin [Ω]: Cout [F]:
ESRout [Ω]: Kh_Lout [Constant]: B_Lout [Tesla]: x_Lout [Exponent]:

Calculated Parameters
D: Tsw [s]: diLout [in %]: dVCout [in %]:


Select Your Power Devices
Use parametric data from datasheet tables        Add measurement data from datasheet graphs

Select Mosfet Part [Q1]

Material Qualification
Configuration Mounting
VDS [V] [Vin = 40V] - Industry Package



   OR   

Note: Configuration, VDS [V], RDSon [mOhm] (Typ/Max), Vth_Max [V], Vgp_Typ [V]

Select Mosfet Part [Q2]

Material Qualification
Configuration Mounting
VDS [V] [Vin = 40V] - Industry Package



   OR   

Note: Configuration, VDS [V], RDSon [mOhm] (Typ/Max), Vth_Max [V], Vgp_Typ [V]


Select Gate Driver Part [G1]

Channel Type Gate Type
Drive Configuration Qualification
Input Type Mounting
BSVoltage [V] - Package




Note: BSVoltage [V], Ipsource_Typ [A], Ipsink_Typ [A], Ton_Typ [us], Toff_Typ [us], Trise_Typ [us], Tfall_Typ [us]


Select Gate Driver Part [G2]

Channel Type Gate Type
Drive Configuration Qualification
Input Type Mounting
BSVoltage [V] - Package




Note: BSVoltage [V], Ipsource_Typ [A], Ipsink_Typ [A], Ton_Typ [us], Toff_Typ [us], Trise_Typ [us], Tfall_Typ [us]



Converter Steady State Waveforms (assuming ideal switches)


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  • STEP-1
  • STEP-2
  • STEP-3
  • STEP-4



Loading.. ILav, IL Vs. Time
IL_RMS = 5.003 A


Loading.. VL, Vin, Vout Vs. Time


Loading.. Iin, ICin Vs. Time
Iin_RMS = 3.393 A
ICin_RMS = 2.619 A


Loading.. Q1_Parameters Vs. Time
Q1_VDS_RMS = 33.450 V
Q1_IDS_RMS = 3.403 A


Loading.. Q2_Parameters Vs. Time
Q2_VDS_RMS = 21.998 V
Q2_IDS_RMS = 4.179 A


Loading.. VGS Vs. Time


Loading.. VDS Vs. Time
Q1_VDS_RMS = 33.450 V
Q2_VDS_RMS = 21.998 V


Loading.. IDS Vs. Time
Q1_IDS_RMS = 3.403 A
Q2_IDS_RMS = 4.179 A


Loading.. PowerLoss Vs. Time