Wide Input-Voltage Range, 2.2MHz, 2A Buck Converters with Integrated Power MOSFET Are Ideal for Noise-Sensitive Applications
SUNNYVALE, CA-March 13, 2006-Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX5088 and MAX5089 high-frequency buck converters, capable of operating from either a wide 5.5V to 23V or a regulated 4.5V to 5.5V input-voltage range. The output voltage is adjustable from 0.6V to 17V. The MAX5088 and MAX5089 include an internal, high-side n-channel MOSFET and can deliver up to 2A of output current.
The MAX5088/MAX5089 can operate at up to 2.2MHz switching frequency, thus eliminating interference in the noise-sensitive tuner AM frequency band or the ADSL2+ frequency band. Moreover, both devices can be synchronized to an external clock to allow frequency hopping in noise-sensitive applications. These devices are also ideal for use in noise-sensitive automotive radio and xDSL power supplies, meet the stringent requirements for point-of-load power-supply applications in set-top boxes, servers, switches/routers and Telecom line cards.
The MAX5088 is a non-synchronous DC-DC converter with a power-on-reset output. It includes a clock output to drive a second DC-DC converter 180° out-of-phase, thus reducing the size of the input capacitors. The MAX5089 includes a synchronous rectifier driver to drive an external, low-side n-channel MOSFET for achieving high efficiency over a wide input-voltage range. In addition, the MAX5089 includes a power-good output, which signals a microcontroller that the output voltage is in regulation. These devices use external compensation, which allows the use of lowest cost inductors and output capacitors while optimizing loop stability, thereby reducing bill-of-material cost.
The MAX5088 and MAX5089 operate over the -40°C to +125°C automotive temperature range and are available in a space-saving 5mm x 5mm 16-pin, thermally enhanced TQFN package. The price for the MAX5088 and MAX5089 are $1.75 and $1.94, respectively (1,000-up, FOB USA).
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