Simple Buck Converter

Components used

SPICE netlist

* **************************************************
* Generated from CircuitSim Schematic
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C_C1 N6 0 29.5u IC=0
x PARAMS:
L_L1 N8 N5 22u IC=0
R_R_CESR N4 N6 20.0m Resistor_1d9c8cf9a temp=27
R_R_LESR N5 N4 10.5m Resistor_1d9c8cf9a temp=27
R_R_Load N3 0 5.00 Resistor_1d9c8cf9a temp=27
xS1 N7 N9 N11 TRANSISTORDIODE_a714af7d PARAMS: CtrlOn=5 TranRon=1m TranRoff=1meg TranVon=0 DiodeRon=10m DiodeRoff=1meg DiodeVon=0
X_U1 N10 N11 PWM_4065ea6a Frequency=100k OutputVoltage=5 TriangleMin=0 TriangleMax=1
V_V_Duty N10 0 dc 205m ac 0 0 distof1 0 0 distof2 0 0
V_V1 N7 0 dc 24 ac 0 0 distof1 0 0 distof2 0 0
E_V_out V_out 0 N4 0 1
E_PR1 PR1 0 N11 0 1
V_I_Load N4 N3 0
V_I_Inductor N9 N8 0

**************************************************
* Models and supporting definitions follow
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.subckt {0} a k params: Vf=0 Rdon=1m Rdoff=10meg
    ad1 %vd(a k) %id(a k) diode1
    .model diode1 pwl(x_array=[{Vf-1} {Vf} {Vf+1}] y_array=[{-1/Rdoff} 0 {1/Rdon}] fraction=false input_domain=1e-12)
.ends
.model Resistor_1d9c8cf9a r(tc1=0 tc2=0 tnom=27)
.subckt TRANSISTORDIODE_a714af7d upper lower ctrlp params: CtrlOn=5 TranRon=1m TranRoff=1M TranVon=0 DiodeRon=10m DiodeRoff=1M DiodeVon=0
    .MODEL TRANSISTORDIODE_a714af7d_Sw1 SW(Ron={TranRon} Roff={TranRoff} Vt={(CtrlOn+0)/2} Vh={(CtrlOn-0)*0.499})
    .model TRANSISTORDIODE_a714af7d_Diode1 pwl(x_array=[{DiodeVon-1} {DiodeVon} {DiodeVon+1}] y_array=[{-1/DiodeRoff} 0 {1/DiodeRon}] fraction=false input_domain=0.0)

    s1 upper lower_ ctrlp 0 TRANSISTORDIODE_a714af7d_Sw1

    Von lower_ lower {TranVon}

    ad1 %vd(lower upper) %id(lower upper) TRANSISTORDIODE_a714af7d_Diode1

.ends
.subckt PWM_4065ea6a in out params: Frequency=10K TriangleMin=0 TriangleMax=1 OutputVoltage=5
    * The small phase offset and plateaus avoid terminal-timestep events while preserving a 99.8% linear triangle period.
    Vtriangle triangle 0 PULSE({TriangleMin} {TriangleMax} {0.0001/Frequency} {0.499/Frequency} {0.499/Frequency} {0.001/Frequency} {1/Frequency})
    Bout out 0 V={(V(in)>V(triangle)) ? OutputVoltage : 0}
.ends

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* Simulation settings
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.options rshunt=1e12
.tran 200n 1e12 0 200n
.save V(V_out) V(PR1) I(V_I_Inductor) I(V_I_Load)
.end