Pulse width modulated power supply operative over an extended input power range without output power dropout

A pulse width modulated power supply, comprising:

• circuit means including inductor means connected to an input voltage, diode means connected to the inductor means, and capacitor means connected to the diode means and to a load, said circuit means providing an output voltage across the load;
• control logic means connected across the load;
• switching means connected between the inductor means and the diode means and connected to the control logic means, and controlled by said control logic means;
• input voltage scaling means;
• mode detector means connected to the input voltage scaling means and to the control logic means and responsive to an input from the input voltage scaling means for applying an output to the control logic means for controlling said control logic means;
• transistor means connected to the capacitor means;
• transistor voltage scaling means connected across the transistor means;
• gate driver logic means connected to the mode detector means, the transistor voltage scaling means and the transistor means and responsive to an other output from the mode detector means and an output from the transistor voltage scaling means for controlling said transistor means;
• and
• the output voltage across the load being provided without a dropout of the input voltage and without an adverse effect on said load.