The most common type of power supply today is the switching supply. These units use pulse-width modulation (PWM) to regulate output. Supplies today employ several different PWM circuit configurations.

This 3V to 24 volt variable-regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3. ... The 1458 may be substituted in the ...

Figure 1: This one-op-amp circuit derives a regulated plus-and-minus supplies from unregulated plus-and-minus input voltages. (Note: OP1 is a Maxim MAX4495 device.) The op amp then operates from the ...