The MIC2166 is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipment.

The MIC2166 operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V supply to power the internal control circuitry. MIC2166 operates at a constant 600kHz switching frequency and can be used to drive up to 25A of output current. The output voltage is adjustable from 0.8V to 5.5V.

A unique Hyper Speed Control™ architecture enables ultra-fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible.

A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from over heating. Also, a soft-start feature is provided to reduce the inrush current. Short current sensing on the bottom MOSFET with hiccup mode operation ensures protection in case of an output short circuit. Further, the MIC2166 includes an EN pin to shut down the converter and a Power-Good (PGOOD) pin to allow simple sequencing.

The MIC2166 is available in a 10 pin MSOP ePad package with a junction operating termperature range from -40°C to +125°C.

  Hyper Speed Control™ architecture enables

  High delta V operation (V IN=28V and V OUT=0.8V)

  Smallest output capacitance

  Built-in 5V regulator for single-supply operation

  Any Capacitor™ stable

  Zero ESR to high ESR

  Power Good (PGOOD) output

  Input voltage range: 4.5V to 28V

  5µA typical shutdown current

  25A output current drive capability

  Adjustable output from +0.8V to 5.5V with ±1% accuracy

  600kHz switching frequency

  Internal 5ms digital soft-start

  Thermal shutdown and "hiccup" current limit protection

  No external current-sense resistor required

  Safe start-up into pre-biased loads

  10-pin MSOP ePad package

  -40°C to +125°C junction temperature range