The MIC2169A is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 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 Na€‘Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range.

The MIC2169A senses current across the high-side N-Channel 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.

  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 MOSFET current

  No external current-sense resistor

  Adaptive gate drive increases efficiency

  Overvoltage protection protects the load in fault conditions

  Dual mode current limit speeds up recovery time

  "Hiccup" mode short-circuit protection

  Internal soft-start

  Dual function COMP and EN pin allows low-power shutdown

  Small size MSOP 10-lead package