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60V synchronous buck controller eases power supply design

Posted: 28 May 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Intersil? buck controller? power supply? point-of-load supplies?

The device features an input voltage range of 4.5V to 60V that covers all standard input rails including 5V, 12V, 24V, 36V, 42V and 48V. It also flaunts a wide voltage output range configurable from 0.6V to 54V.

According to the company, the device enables a very low duty cycle power supply and eliminates the need for a two-stage solution in many applications. It is also has a programmable 100kHz to 2Mhz switching frequency that can be synchronised to reduce radiated system noise and avoid beat frequency issues. It offers complete fault protection for long term reliability including over-voltage, under-voltage, over-current and over-temperature, and delivers high current FET drivers and DEM mode operation that ensures efficiency at all load levels. Likewise, its adjustable soft-start with pre-bias support enables the sequenced startup of multiple ISL8117 controllers.

The ISL8117 high voltage controller can be combined with low dropout linear regulators and integrated FET switching regulators to support the bulk power rails in a typical process control industrial application.

In 4mm x 4mm QFN and 6.4mm x 5mm HTSSOP packages, pricing is respectively $1.80 and $1.95 (1,000). Two evaluation boards priced at $80 allow designers to evaluate device features and performance: ISL8117EVAL1Z low power (Vin 4.5V to 60V and 3.3Vout/6A), and the ISL8117EVAL2Z high power (Vin 18V to 60V and 12Vout/20A). Two demonstration reference design boards priced at $60 allow designers to produce low power (factory automation or robotic) and high power (telecom or pachinko) applications.

- Graham Prophet
??EE Times Europe

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