Micrel Expands Hyper Speed Control Family Of Synchronous DC-DC Controllers
Micrel, Inc. expanded its family of Hyper Speed Control™ Synchronous dc-dc controllers with the introduction of the MIC2166. The device is a wide input voltage range, high performance, adaptive on-time dc-dc controller capable of driving up to 25A of load current.
Built into the MIC2166 is an internal VDD regulator that enables single-supply operation. Micrel’s unique Hyper Speed Control architecture significantly reduces the required output capacitance and allows for excellent transient response, while making high delta-V operation (VIN=28V, VOUT=0.8V) possible. The solution is well suited for set-top boxes, gateways, routers, computer peripherals, and applications with low voltage distributed power requirements.
"A host of customer friendly features such as internal 5V VDD regulator and PowerGood output, combined with Micrel’s unique Hyper Speed Control architecture, offer terrific benefits such as reduced BOM cost and world class transient response," stated Doyle Slack, Director of Analog Marketing, Micrel. "The MIC2166 is Any Capacitor stable – stability is maintained from zero ESR to high ESR, thereby allowing a great degree of flexibility for the designer."
The MIC2166 operates at 600 kHz switching frequency, operates over a supply range of 4.5 to 28V and can be used to provide up to 25A of output current. The device achieves up to 95% efficiency, while still switching at high frequencies over a broad load range. An UVLO feature is provided to ensure proper operation under power-sag conditions which prevents the external power MOSFET from overheating. A digital soft start feature is included to reduce the inrush current. Short Current Sensing on the Bottom MOSFET with hiccup ensures protection in case of output short circuit. The MIC2166 includes an enable (EN) input to shutdown the converter and a Power Good output that allows simple sequencing. The device is stable with any output capacitor (zero to high ESR). The MIC2166 is available in a 10-pin ePad MSOP package with a junction operating range from –40 to +125°C.
The MIC2166 is currently available in volume quantities with pricing starting at $0.93 for 1K.
