The National Semiconductor LM 1578 A is very a switching regulator Which should easily be set up for such dc-to-dc voltage .conversion circuits as the buck, boost, and inverting configurations. The LM 1578 A features a distinctive comparator input stage Which not just} has separate pins for both the inverting and non-inverting inputs, but as well offers an internal 1.0 V reference to every input, thereby simplifying circuit design and PC board layout.
The output can switch upto 750 m A and has output pins for its collector and emitter to market design flexibility. An external current limit terminal tend to be referenced to either the ground or the Vin terminal, depending upon the application. In addition, the LM 1578 A has an on board oscillator, Which sets the switching frequency with other a single external capacitor in one < 1 Hz to 100 kHz (typical). It operates in one supply voltages of 2 V to 40 V. it's really provided with other current limit and thermal shutdown. Duty cycle up to 90 %. Functional diagram is given in figure.
