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In addition to an overvoltage protection able to keep the output voltage under

control during transient conditions, the IC is provided also with a protection against

feedback loop failures or erroneous settings and boost inductor saturation. The

brownout protection function allows to design medical equipment according to the

latest regulations driven by IEC 60601-1-2 which requires the output regulation in

case of mains dips lasting up to 500 msec. Soft-start limits the peak current.

The totem-pole output stage, capable of 0.7 A source and 1.5 A sink current, is

suitable for big MOSFET or IGBT drives.

L4985

DS13769 - Rev 3

page 2/27