New Industry Products

IR Family of 4 x 5 mm Integrated SupIRBuck POL Voltage Regulators Shrinks PCB Size

November 02, 2010 by Jeff Shepard

International Rectifier (IR)® 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% 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, 6 and 9A output current respectively to achieve more than 96% 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 12V input voltage, superior efficiencies are also achieved in applications with single 5V 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% 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 9A," 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% accurate 0.7V reference in 0-125°C temperature range, and -40 to 125°C operating junction temperature.

Pricing for the IR3853M begins at US $1.10 each in 100,000-unit quantities. The IR3856M and IR3859M cost US $1.25 and US $1.40 each respectively in 100,000-unit quantities. Pricing for the new IRDC38(53)(56)(59) SupIRBuck reference designs starts at US $94 per kit. Production orders are available immediately.