In this installment of Circuit VR, we’ll look at a simple buck converter — that is a switching regulator that takes a higher voltage and produces a lower voltage.

Figure 5 shows the circuit diagram of configuring the ISL85415 buck switcher as an inverting buck-boost converter. ... Figure 8 Operating waveforms for an Isolated buck-boost Topology: +/- output 5.

The circuit is a step-down (buck) dc-dc converter that produces a positive output voltage that’s less than the input voltage . U1 is a 35-kHz square-wave oscillator with a tH (high time) of 16.3 ...