IR's Family of 4 x 5 mm Integrated SupIRBuck® Point-Of-Load Voltage Regulators with 33% Smaller Footprint Dramatically Shrinks PCB Size

Nov 3, 2010 | Technology Media

EL SEGUNDO, Calif. — International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced a new family of SupIRBuck® integrated point-of-load (POL) voltage regulators in a compact 4 x 5 mm package. The devices, tailored for energy-efficient server, storage, telecom, netcom and set-top box applications offer the same efficiency and functionality as previous generation devices in a 33 percent smaller footprint.

The IR38(53)(56)(59) SupIRBuck voltage regulators integrate a high performance controller with latest generation MOSFETs in a slim 4 x 5 mm PQFN package, and deliver 4 A, 6 A and 9 A output current respectively to achieve more than 96 percent peak efficiency. New features include over-voltage protection, an external synchronization option to reduce noise and EMI in multi-rail systems, true output voltage sensing option for adjustable PGOOD, and OV threshold setting.

The new devices eliminate the need for traditional dual stage POL conversion and save energy, size and cost by operating directly from 12 Vin. While optimized for 12 V input voltage, superior efficiencies are also achieved in applications with single 5 V input voltages. As a result of programmable switching frequencies up to 1.5 MHz and small 4 x 5mm footprint, the new voltage regulators shrink size and cost, in addition to achieving higher power density. Moreover, the common footprint of the devices provides design flexibility and allows cut-and-paste layout for fast time-to-market.

"The IR38(53)(56)(59) family provides the same efficiency and functionality as previous SupIRBuck devices in a 33 percent smaller footprint to dramatically reduce PCB size, making them well suited for space constrained POL applications. Additionally, this new SupIRBuck family offers a smaller and more cost competitive solution below 9 Amps," said Cecilia Contenti, IR's POL product marketing manager, Enterprise Power Business Unit.

SupIRBuck family features also include programmable hiccup current limit, programmable soft start, enhanced pre-bias start up, thermal protection, enable pin with voltage monitoring capability, Power Good output for under-voltage and over-voltage detection, ±1 percent accurate 0.7V reference in 0-125°C temperature range, and -40°C to 125°C operating junction temperature.

Datasheets and application notes are posted on the International Rectifier website at The IRDC3853, IRDC3856 and IRCD3859 SupIRBuck reference designs featuring the new devices are also available.

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