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+//example 7.5 
+clc; funcprot(0);
+// Initialization of Variable
+R=10.0;//resistance
+V1=5.0;//V
+V2=12.0;//V
+Ta=80.0;//degreeC
+Tb=150.0;
+f=150.0;//frequency
+//calculation
+D=V1/V2;
+disp(D*100,"duty cycle in %")
+T=1/f;
+disp(T*1000,"time period in microsec:")
+t=D*T;
+disp(t*1000,"on time in microsec:")
+Id=V1/R;
+disp(Id*1000,"load current in mA:")
+i=.25*Id;
+disp(i*1000,"ripple current in mA:")
+Vl=V2-V1;
+disp(Vl,"inductor voltage in V:")
+L=Vl*t/i;
+disp(L*1000,"inductor in microH:")
+Ip=Id+i/2;
+disp(Ip*1000,"inductor current in mA:")
+Ic=Id/2;
+disp(Ic*1000,"minimum capacitor current in mA:")
+Vc=1.5*V2;
+disp(Vc,"minimum capacitor voltage in V:")
+K=V1/1.23-1;
+disp(K,"Rf/Ri = :")
+P=.01*V2+D*Id*1;
+disp(P,"power of LM2595 in W:")
+Q=(Tb-Ta)/P-2.2;
+disp(Q,"thermal resistance in degreeC/W:")
+clear()