LTC3642,pdf datasheet (High Vo

The LTC3642 is a high effi ciency step-down DC/DC
converter with internal high side and synchronous power
switches that draws only 12μA typical DC supply current
at no load while maintaining output voltage regulation.
The LTC3642 can supply up to 50mA load current and
features a programmable peak current limit that provides
a simple method for optimizing effi ciency in lower current
applications. The LTC3642’s combination of Burst Mode®
operation, integrated power switches, low quiescent current,
and programmable peak current limit provides high
effi ciency over a broad range of load currents.
With its wide 4.5V to 45V input range and internal
overvoltage monitor capable of protecting the part through
60V surges, the LTC3642 is a robust converter suited for
regulating a wide variety of power sources. Additionally,
the LTC3642 includes a precise run threshold and soft-start
feature to guarantee that the power system start-up is
well-controlled in any environment.