The LM1578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck boost and inverting configurations The LM1578A features a unique comparator input stage which not only has separate pins for both the inverting and non-inverting inputs but also provides an internal 1 0V reference to each input thereby simplifying circuit design and p c board layout The output can switch up to 750 mA and has output pins for its collector and emitter to promote design flexibility An external current limit terminal may be referenced to either the ground or the Vin terminal depending upon the application In addition the LM1578A has an on board oscillator which sets the switching frequency with a single external capacitor from k1 Hz to 100 kHz (typical) The LM1578A is an improved version of the LM1578 offering higher maximum ratings for the total supply voltage and output transistor emitter and collector voltages