The MIC2128 is a constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2128 operates over an input voltage range from 4.5V to 75V and can be used to supply load current up to 25A (Thermally Limited) . The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 270kHz to 800kHz.

The MIC2128 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, Adjustable soft-start to reduce inrush current, "hiccup" mode short-circuit protection, and thermal shutdown.

  Hyper Speed Control® architecture enables:

  4.5V to 75V input voltage

  Adjustable output voltage from 0.6V to 30V

  270kHz to 800kHz programmable switching frequency

  Externally programmable soft start

  Enable input and power good output

  Built-in 5V regulator for single-supply operation

  Auxiliary bootstrap LDO

  Internal Bootstrap diode

  Programmable current limit and "hiccup" mode short-circuit protection

  Internal compensation, and thermal shutdown

  Supports safe start-up into a pre-biased output

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

  Available in 16-pin 3mm x 3mm QFN package