1. SupIRBuck™ Point-of-Load Voltage Regulators in a Compact 4x5 mm Package PRESS RELEASE DATA SHEETS The IR3853, IR3856 and IR3859 SupIRBuck voltage regulators integrate a high performance controller with latest generation MOSFETs in a slim 4 x 5 mm PQFN package and deliver 4A, 6A and 9A output current respectively to achieve more than 96 percent peak efficiency. 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. New features include Over Voltage Protection (OVP), external synchronization and optional output voltage monitoring input for adjustable PGOOD and OVP threshold setting. HI-RES GRAPHIC SuPIRBuck™ PAGE • Features • Greater than 96% peak efficiency • Pin compatible solutions for 4A, 6A and 9A • Wide input voltage range 1.5V to 21V (with 5V Bias) • Wide output voltage range 0.7V to 90% of the input voltage • Integrated bootstrap diode, cont FET and Sync FETKY • High bandwidth E/A for excellent transient performance • Programmable frequency up to 1.5MHz • ±1% accurate 0.7V reference voltage in 0-125C temp range • Programmable hiccup current limit • Programmable soft start • Enhanced pre-bias start up • Thermal protection • Enable pin with voltage monitoring capability • Power Good output for Over-voltage and Under-voltage detection • Sequencing for simultaneous power-up/down of different rails • Over Voltage Protection • Optional output voltage monitoring input for adjustable PGOOD and OVP threshold setting • External synchronization • -40C to 125C operating junction temp (Tj) • Halogen free, lead free and RoHS compliant ON-LINE DESIGN TOOL • Advantages • The three new devices eliminate the need for traditional dual stage POL conversion and save energy and cost by operating directly from 12 Vin. • While optimized for 12V input voltage, superior efficiencies are also achieved in applications with 5V input voltages. • As a result of programmable switching frequencies up to 1.5 MHz and small 4 x 5 mm footprint, the new voltage regulators shrink size and cost, in addition to achieving higher power density. • The common footprint of the devices provides design flexibility and allows cut-and-paste layout for fast time-to-market. • Excellent package thermal properties and low height allows back-side board mounting for additional space savings. November 2010