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Micrel launches power management IC for cell phones

Posted: 02 Mar 2007     Print Version  Bookmark and Share

Keywords:Micrel  power management IC  MIC2810 

Micrel Inc. has launched the MIC2810, a highly efficient, flexible power management IC that provides three output voltages and a power on reset in a tiny 3-by-3mm-by-MLF-16 package. The solution is suitable for use in cell phones, smart phones, PDAs, cameras, portable media players, wireless LAN cards and Bluetooth applications.

The MIC2810 features a wide input range of 2.7V to 5.5V, three voltage outputs and a power-on reset. Output 1 is a high frequency, high efficiency DC/DC switching regulator for up to 600mA while outputs 2 and 3 are low dropout linear regulators. One of the linear regulators can be directly connected to the output of a DC/DC converter or to directly to the main power rail.

The MIC2810 is a uCap design, operating with very small ceramic output capacitors for stability and reducing solution footprint and cost. The DC/DC converter provides virtually no noise in light load mode and just 75µVRMS output noise in LOWQTM mode. This allows designers to avoid higher noisy light-load modes that have traditionally interfered with sensitive RF circuitry. The solution operates at 2MHz PWM in normal mode, more than 93 per cent efficiency, and only requires a tiny 2.2µF output capacitor and a 2.2µH inductor for stability. The part also integrates a power-on reset (POR) circuit that monitors all three output voltages. Independent enables for the switching and two linear regulators allow for design flexibility. Consisting of one switching DC/DC and two LDOs, Micrel's MIC2810 solution footprint is 25 per cent smaller than the smallest discrete solution currently on the market.

The device is also suited to powering Complex Programmable Logic Devices (CPLDs) from a 3.3V or 5V rail in general purpose applications. The MIC2810 is currently available in volume and pricing starts at Rs.101.97 ($2.25) for 1,000-piece quantity.

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