New Micrel DC-DC Converter Family Enables Point-of-Load Designs With High Power Density And High Efficiency

“System designers need to implement power supplies that are as efficient and as small as possible,” stated Brian Hedayati, marketing vice president for the analog division at Micrel. “Micrel’s proprietary
HyperSpeed Control and HyperLight Load Control architectures used in SuperSwitcher II family allow designers to create miniscule power supplies optimized for efficiency at the most important power level for each design. The common footprint of Micrel’s SuperSwitcher II family also enables maximum design re-use over a wide range of output currents.”

The MIC26601/901/1201 and the MIC26603/903/1203 operate with an input supply voltage range from 4.5V to 28V, and deliver an output current of 6A, 9A and 12A respectively. The SuperSwitcher II family has been tailored to be Any CapacitorTM stable, independent of the output capacitance Equivalent Series Resistance (ESR), thus solving the perpetual problem of stability that power designers face when dealing with distributed output capacitance. The SuperSwitcher II family of buck regulators can drive DC-DC loads at more than 95 percent efficiency, operate at 600kHz switching frequency with ±1 percent output voltage accuracy; the output is adjustable down to 0.8V.

The SuperSwitcher II devices have an onboard 5V regulator allowing single-supply operation, an enable pin for very low power shutdown, internal soft start, under-voltage lockout, and internal compensation, in addition to a host of protection features such as pre-bias safe startup, over temperature protection, fold-back current limit and short circuit protection. The MIC26601/901/1201 and the MIC26603/903/1203 buck regulators are available in a thermally enhanced lead-free 28-Lead 5mm x 6mm MLF® package.