MIC2125 and MIC2126 are constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2125/6 operates over an input voltage range from 4.5V to 28V and can be used to supply load current up to 25A . The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 200kHz to 650kHz.

HyperLight Load? architecture provides the same high efficiency and ultra-fast transient response as the Hyper Speed Control? architecture under the medium to heavy loads. It also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous conduction mode operation.

The MIC2125/6 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, internal soft-start to reduce inrush current, "hiccup" mode short-circuit protection, and thermal shutdown.

  Hyper Speed Control? architecture enables:

  High delta-V operation (VIN = 28V and VOUT = 0.6V)

  Any Capacitor? stable

  4.5V to 28V input voltage

  Adjustable output voltage from 0.6V to 24V

  200kHz to 650kHz programmable switching frequency

  HyperLight Load? (MIC2125)

  Hyper Speed Control? (MIC2126)

  Enable input and power good output

  Built-in 5V regulator for single-supply operation

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

  7ms internal soft-start, 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