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Power Electronics

Miniature, Efficient, Low-Profile, DC-DC Power Modules for Space-Constrained Applications

Micrel, Inc. 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.

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°C to +125°C while the MIC33263/MIC33264 are specified from -40°C to +85°C.

The MIC33163/4 and MIC33263/4 are available in volume with 1,000 quantities pricing starting at $1.32 and $1.70, respectively.

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