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Maxim releases dc/dc converter for GBIC, xDSL modems

Posted: 20 Feb 2002 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? power conversion? dc converter ic? dc/dc converter ic? power conversion ic?

Designed for GBIC modules and USB-powered xDSL modems and routers, the MAX1970/MAX1971/MAX1972 dual step-down dc/dc converters operate up to 1.4MHz and 180 out-of-phase.

The devices integrate power MOSFETs and deliver 750mA at 2.6V to 5.5V. They also feature monitoring functions such as power-on reset and power-fail detection for USB-powered devices.

The MAX1971 has a 700kHz switching frequency that minimizes inductor and capacitor size. Designed for GBIC and SFF module applications, the IC's 180 out-of-phase operation reduces the input bypass capacitor to 10?F and minimizes inrush current at power-up.

The device also features one percent accuracy, allowing accurate voltage setting and minimizing power consumption.

The MAX1970/MAX1972 operate at 1.4MHz to eliminate interference with the ADSL band. They feature a 10mF input capacitor to comply with USB requirements, while a USB power-fail detector (for "dying-gasp" applications) is integrated to allow orderly shutdown when power is removed.

For telecom and networking equipment, these devices eliminate two LDOs and reduce heat when operated from a 3.3V or 5V input bus.

These devices are specified for the extended-industrial temperature range of -40C to 85C and come in 16-pin QSOP housings.

The MAX1970EEE/MAX1971EEE is priced at $2.50 and the MAX1972EEE is quoted at $3.50, both in quantities of 1,000 and up.

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