Datasheet Microchip MIC2169A — Datenblatt

MIC2169A Micrel MIC2169A
500kHz PWM Synchronous Buck Control IC General Description Features The MIC2169A is a high-efficiency, simple to use 500kHz
PWM synchronous buck control IC housed in a small MSOP10 package. The MIC2169A allows compact DC/DC solutions
with a minimal external component count and cost.
The MIC2169A 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 efficiencies over
95% across a wide load range.
The MIC2169A 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 coefficient that tracks
the increasing RDS(ON) of the external MOSFET. Further cost
and space are saved by the internal in-rush-current limiting
digital soft-start.
The MIC2169A 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. 3V to 14.5V input voltage range
Adjustable output voltage down to 0.8V
Up to 95% efficiency
500kHz PWM operation
Adjustable current limit senses high-side N-Channel …