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4x5mm POL voltage regulators boast reduced PCB size

Posted: 09 Nov 2010     Print Version  Bookmark and Share

Keywords:POL voltage regulator  PQFN  server  storage 

International Rectifier (IR) presents the IR38(53)(56)(59) SupIRBuck integrated point-of-load (POL) voltage regulators in a compact 4x5mm PQFN package targeting energy-efficient server, storage, telecom, netcom and set-top box applications.

POL voltage regulators

IR's POL product marketing manager (Enterprise Power Business Unit), Cecilia Contenti cites, "This new SupIRBuck family offers a smaller and more cost competitive solution below 9A."

The IR38(53)(56)(59) SupIRBuck voltage regulators combine a controller with MOSFETs delivering 4A, 6A and 9A output current options, with over 96 per cent peak efficiency.

Updated features consist of over-voltage protection, an external synchronisation option to decrease noise and EMI in multi-rail systems, true output voltage sensing option for adjustable PowerGOOD and OV threshold setting.

These devices do away with traditional dual stage POL conversion, thereby saving energy, size and cost by functioning directly from 12Vin. While optimised for 12V input voltage, superior efficiencies may also be attained in applications with single 5V input voltages. As a result of programmable switching frequencies up to 1.5MHz and its small footprint, the voltage regulators shrink size and cost, in addition to having higher power density. Furthermore, the common footprint of these devices give design flexibility and permit "cut-and-paste" layout, enabling rapid time-to-market.

Finally, the SupIRBuck family also features programmable hiccup current limit, programmable soft start, enhanced pre-bias start up, thermal protection, enable pin with voltage monitoring capability, Power Good.

The IRDC38(53)(56)(59) SupIRBuck reference designs are priced at Rs.4,198.99 ($94) per kit. Pricing for IR3853M is Rs.49.14 ($1.10), IR3856M is Rs.55.84 ($1.25) and IR3859M is Rs.62.54 ($1.40), each in 1,00,000-unit quantities.

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