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Buck regulator with LOWQ mode

Posted: 15 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:micrel? mic2206? pwm synchronous buck regulator?

A new 2MHz PWM synchronous buck regulator with LOWQ mode and voltage scaling was recently unveiled by Micrel Inc.

The new MIC2206 PWM synchronous buck regulator featuring an LDO standby mode quiescent current of 18?A with dual voltage level for stand-by and sleep modes. When in LOWQ mode, the output voltage drops to 1V, reducing the current draw by the circuit being powered, reducing power in Sleep Mode and increasing stand-by time. While this feature saves battery life, said Micrel, it also helps avoiding spurious noise or high ripple, conditions commonly found in pulse skipping or burst mode regulators currently on the market.

"The MIC2206 is aimed at meeting the growing power needs and changing voltage requirements of today's ASICs, DSPs and microprocessors which are used in a wide variety of consumer applications," commented Ralf Muenster, Micrel's director of marketing for power products. "The MIC2206 saves on valuable battery life, while keeping noise to an absolute minimum, making it an ideal choice for cellular phones, PDAs and USB peripherals."

The MIC2206 can operate at 100 percent maximum duty cycle in low dropout conditions and delivers highly efficient (>95 percent) power at 2MHz frequency. This helps to optimize the usage of battery charge while maintaining the lowest possible size and cost of passive components, explained Micrel.

With pricing starting at $1.98 for 1,000-unit quantities, the MIC2206 is offered in a small, 3-by-3mm MLF-10lds package.




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