Synchronous DC-DC controllers enable single-supply operation

San Jose, Calif.— Micrel Inc. has expanded its family of Hyper Speed Control Synchronous DC-DC controllers with the MIC2166, a wide input voltage range, adaptive on-time device capable of driving up to 25A of load current. 

Built into MIC2166 is an internal 5V VDD regulator that enables single-supply operation.  The MIC2166 operates at 600 kHz switching frequency and over a supply range of 4.5V to 28V.  The device achieves up to 95 percent 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). 

Applications include set-top boxes, gateways, routers, computer peripherals, and applications with low voltage distributed power requirements. 

The MIC2166 is available in a 10-pin ePad MSOP package with a junction operating range from –40 ºC to +125 ºC. 

Pricing: Starts at $0.93 for 1K. 

Availability: Volume quantities.

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