The Micrel MIC2103/04 are constant-frequency, synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2103/04 operates over an input supply range from 4.5V to 75V and can be used to supply up to 15A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 200kHz to 600kHz.

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

The MIC2103/04 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include under-voltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, fold-back current limit, "hiccup" mode short-circuit protection and thermal shutdown. The MIC2103/04 is available in a 16-pin 3mm x 3mm MLF® package with a junction temperature operating range from -40°C to +125°C.

  Hyper Speed Control™ architecture enables

  High delta V operation (V IN=75V and VOUT=1.2V)

  Any Capacitor™ stable

  4.5V to 75V input voltage

  0.8V Reference Voltage with ±1% accuracy

  200kHz to 600kHz, programmable switching frequency

  Hyper Light Load Control (MIC2103 only)

  Hyper Speed Control (MIC2104 only)

  Enable input, Power-Good output

  Built-in 5V regulator for single-supply operation

  Programmable current limit and fold-back “hiccup” mode short-circuit protection

  5ms 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 MLF® package