The LM1771 is an efficient synchronous buck switching controller
with a precision enable requiring no external compensaTIon.
The constant on-TIme control scheme provides a
simple design free of compensaTIon components, allowing
minimal component count and board space. The precision
enable pin allows flexibility in sequencing mulTIple rails and
setting UVLO. The LM1771 also incorporates a unique input
feed-forward to maintain a constant frequency independent
of the input voltage. The LM1771 is optimized for a low
voltage input range of 2.8V to 5.5V and can provide an
adjustable output as low as 0.8V. Driving an external high
side PFET and low side NFET it can provide efficiencies as
high as 95%.
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