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Micrel Launches New Family of Miniature, Efficient, Low-Profile, DC-DC Power Modules

6th October 2014

Micrel, Inc.

Jacqueline Regnier

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Micrel introduced the MIC33163/MIC33164 (1A) and MIC33263/MIC33264(2A) a family of low-profile step down power modules capable of 100 percent duty cycle and operating with an input voltage range from 2.7V to 5.5V. These compact modules integrate a synchronous buck converter with an inductor into a 2.5mm x 3mm x 1.1mm (MIC33163/4) and 2.5mm x 3mm x 1.9mm (MIC33263/4) QFN package. These complete power solutions are ideal for use in numerous applications including wireless modules, solid state drives, wearable devices, and camera modules. Incorporating Micrel's proprietary FleaFET technology and the Company's HyperLight Load® control architecture, these devices can operate up to 4MHz with excellent light and full load efficiency (up to 88 percent at 10mA and over 93 percent peak efficiency). This architecture provides an ultra-fast load transient response that minimizes output capacitance thereby reducing total board space to just 4.6mm x 7mm. With such a small footprint and 100 percent duty cycle capability, these power modules offer an efficient alternative to linear regulators. The MIC33163/4 and MIC33263/4 are available in volume with 1,000 quantities pricing starting at $1.32 and $1.70, respectively.

"The demand for higher performance continues to increase in many applications such as camera modules or solid state drives, while the form factors stay the same or continue to diminish. This means that designers have less space to fit all the components in these products," noted Brian Hedayati, vice president of marketing for high performance linear and power solutions at Micrel. "Micrel's ultra-compact, low-profile power module solutions are ideal for these space-constrained applications and where busy designers need to complete multiple projects with short design cycle times while addressing EMI issues during the critical development phase. Micrel's power modules meet the exacting EN55022 class B EMI standard which eliminates the EMI concerns while providing a fast turnkey solution that can be used in multiple designs."

In addition to offering high efficiency and a small form factor, these modules are fully protected against overcurrent, overvoltage, and thermal faults. Additional features include adjustable soft-start for controlling in-rush current, an automatic output discharge circuit (MIC33164 /MIC33264), and a power good output. The MIC33163/MIC33164 are specified for a junction temperature from -40-degC to +125-degC while the MIC33263/MIC33264 are specified from -40-degC to +85-degC.