The LM34925 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 MOSFET
switches: a high-side buck switch and a low-side synchronous switch. The constant-on-time (COT)
control scheme employed in the LM34925 device requires no loop compensation and provides excellent
transient response. The regulator operates with an on-time that is inversely proportional to the
input voltage. This feature allows the operating frequency to remain relatively constant. An
intelligent peak current limit is implemented with integrated sense circuit. Other features include
a programmable input under voltage comparator to inhibit operation during low-voltage conditions.
Protection features include thermal shutdown and VCC undervoltage lockout
(UVLO). The LM34925 device is offered in 8-pin WSON and
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8-pin SO PowerPAD plastic packages.