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Power MOSFETs offer up to 20A in 4mm x 6mm TQFN package

Posted: 17 Mar 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Micrel? MOSFET? base station? server? graphic card?

Micrel Inc. has introduced a couple of IntelliMOS power stage family that can deliver up to 20A in a compact 4mm x 6mm TQFN package. The MIC4520/MIC4521 uses the company's high performance FETZillaT DMOS technology to achieve high efficiency (over 90 per cent peak). According to Micrel, the power MOSFETs have been optimised for low gate capacitance to allow fast switching performance (up to 1.2MHz) for minimal switching losses while their low on-resistance reduces conduction losses.

The MIC4521 is a two-phase power stage (includes MOSFET drivers and power MOSFETs) featuring integrated current and temperature sensing. It can be interfaced with a single phase controller (such as Micrel's MIC2111) to build a complete high-current and high-performance power converter. The MIC4520 is a single phase power stage that can operate with a single-phase or multiphase controller. These power stages can be used in a variety of point of load applications for end markets such as networking, servers, storage, base stations and graphic cards. The MIC4520/21 devices are available in volume quantities with 1,000 quantity pricing starting at $2.34/$2.57 respectively.


The MIC4521 claims to offer higher levels of intelligence and telemetry than traditional DrMOS power stages. The integrated current and temperature sensing of the MIC4521 enables power system designers to accurately measure and monitor the condition of each power converter to enhance system reliability. Both the MIC4520 and MIC4521 use Micrel's propriety bi-directional fault communication protocol to provide system protection against faults.

The MIC4520/MIC4521 operate over an input voltage range of 7V to 16V. The devices can be

configured for continuous or discontinuous conduction operation and support diode emulation mode for improved light load efficiency. The MIC4520/MIC4521 have a junction temperature range from -40C to 125C.


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