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Maxim power supplies save system cost

Posted: 28 Apr 2004 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? max8513? max8514? power supply?

Maxim Integrated Products has rolled out its MAX8513 and MAX8514 triple-output, complete xDSL power supplies for modems, routers, and gateways.

Combining an all-n-channel step-down dc-dc converter controller with two linear-regulator controllers, both devices help save system cost. They operate from a low-cost unregulated input in the 4.5V to 28V range, and integrate several functions like tracking/sequencing, output power-on reset (POR), and an input fail monitor. According to Maxim, the products do not require a sense resistor and use all n-channel MOSFETs (no p-channels), and are versatile enough to use electrolytic, polymer, or ceramic capacitors.

The devices' 1.4MHz PWM switching reduces noise and interference in the ADSL band. They can be synchronized to other switchers or a clock, and ceramic capacitors minimize output ripple. The step-down output range is from 1.25V to 5.5V, and the LDO outputs range down to 0.8V.

The MAX8513EEI and MAX8514EEI come in 28-pin QSOP packages and are screened for the extended temperature range. Prices start at $1.45 for 1,000-up orders. The MAX8513 evaluation kit is also available to speed designs.

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