High-voltage buck controller lowers EMI peaks

The MIC2130/1 series of high-voltage synchronous buck-controller ICs offers a frequency-dithering feature that minimises EMI and adheres to global EMC standards. The ±12% switching-frequency dithering produces a spread spectrum thereby lowering any EMI peaks.

Micrel’s MIC21301/1 operates over a wide input voltage range of 8V to 40V and offers adjustable output voltages down to 0.7V. The solution also offers internal drivers for output currents up to 15A and an adaptive gate drive allows efficiencies of more than 95%.

The ICs provide better than 2% output voltage accuracy over -40°C to 125°C, and excellent line and load regulation is offered during transients due to a fast hysteretic control loop. The MIC2131 has advanced current limit protection, which allows for increased current when powering highly capacitive loads quickly. The ICs are available in a 150kHz, 16-pin e-pad TSSOP options.

A 400khz frequency option and a MLF®-16 4mm x 4mm package option will both be available in the first quarter of 2008.

 

FEATURES Low EMI option (MIC2131) Fixed 150kHz and 400kHz frequency options Adaptive gate drive allows efficiencies over 95% Programmable current limit with no sense resistor Senses low-side MOSFET current Internal drivers allow 15A output current Power-good output allows simple sequencing

APPLICATIONS Industrial or medical DC/DC point-of-use power Printer-head drivers Automotive systems Telecom systems LCD or Plasma TVs

 

 

 

Development board MIC2130/1 is available to members of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

Micrel/MIC2130/31