MIC2168A

The MIC2168A is a high-effi ciency, simple to use 1MHz PWM
synchronous buck control IC housed in a small MSOP-10
package. The MIC2168A allows compact DC/DC solutions
with a minimal external component count and cost.
The MIC2168A operates from a 3V to 14.5V input, without
the need of any additional bias voltage. The output voltage
can be precisely regulated down to 0.8V. The adaptive all
N-Channel MOSFET drive scheme allows effi ciencies over
95% across a wide load range.
The MIC2168A senses current across the high-side NChannel
MOSFET, eliminating the need for an expensive
and lossy current-sense resistor. Current limit accuracy is
maintained by a positive temperature coeffi cient that tracks
the increasing RDS(ON)
of the external MOSFET. Further cost
and space are saved by the internal in-rush-current limiting
DS(digital soft-start.
The MIC2168A is available in a 10-pin MSOP package, with
a wide junction operating range of 40°C to +125°C.
All support documentation can be found on Micrel's web site
at www.micrel.com.