Synchronous DC-DC Controller drives up to 25 A of load current.

Press Release Summary:

With 600 kHz switching frequency, Hyper Speed Control(TM) MIC2166 operates over supply range of 4.5-28 V and achieves up to 95% efficiency. Internal VDD regulator enables single-supply operation, while digital soft start minimizes inrush current. UVLO feature ensures proper operation under power-sag conditions, which prevents external power MOSFET from overheating. Available in 10-pin ePad MSOP with junction operating range from -40 to +125°C, IC is suited for set-top boxes, gateways, and routers.

Original Press Release:

Micrel Expands Hyper Speed Control(TM) Family of Synchronous DC-DC Controllers

New Device Offers Micrel's Patented Architecture, Enables Single-Supply Operation

San Jose, Calif., - Micrel Inc., (Nasdaq:MCRL), an industry leader in analog, high bandwidth communications and Ethernet IC solutions, today expanded its family of Hyper Speed Control(TM) 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 MIC2166 is an internal VDD regulator that enables single-supply operation. Micrel's unique Hyper Speed Control(TM) 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 ideal for set-top boxes, gateways, routers, computer peripherals, and applications with low voltage distributed power requirements. The MIC2166 is currently available in volume quantities with pricing starting at $0.93 for 1K. Samples can be ordered on line at: .

"A host of customer friendly features such as internal 5V VDD regulator and PowerGood output, combined with Micrel's unique Hyper Speed Control(TM) 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(TM) 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 4.5V to 28V and can be used to provide up to 25A of output current. 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). The MIC2166 is available in a 10-pin ePad MSOP package with a junction operating range from -40°C to +125°C. All supporting documentation, including a datasheet, can be found on Micrel's website at:

About Micrel

Micrel Inc. is a leading global manufacturer of high performance analog and high-speed mixed signal solutions. The Company's products include advanced mixed-signal, analog and power semiconductors; high performance communication, clock management, Ethernet switch and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe and Asia. In addition, the Company maintains an extensive network of distributors and sales representatives worldwide.

For further information, contact Julieanne DiBene at: Micrel, Incorporated, 2180 Fortune Drive, San Jose, California 95131, (408) 944-0800; or visit the Micrel website at:

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