The MIC2169 is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2169 allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2169 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 MIC2169 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 MIC2169 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

  Fast transient response

  Externally compensated

  Overvoltage protection protects the load in fault conditions

  Dual mode current limit speeds up recovery time

  "Hiccup" mode short-circuit protection

  Small size MSOP 10-lead package