The LM34927 regulator features all of the functions needed to implement a low-cost,efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFETswitches — a high-side buck switch and a low-side synchronous switch. The Constant on-time (COT)control scheme employed in the LM34927 device requires no loop compensation and provides excellenttransient response. The regulator operates with an on-time that is inversely proportional to theinput voltage. This feature allows the operating frequency to remain relatively constant. Anintelligent peak current limit is implemented with integrated sense circuit. Other features includea programmable input undervoltage comparator to inhibit operation during low-voltage conditions.Protection features include thermal shutdown and VCC undervoltage lockout(UVLO). The LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.