Product Change Notice Notice: 110124 Date: 24 JANUARY 2011 To Our Valued Customers: We appreciate your use of V•I Chip products. Our commitment to customer satisfaction is demonstrated by our notification to you of a product change. Description: As part of ongoing improvements in our manufacturing process, V•I Chip testing has determined an improved method for calculating Rout that provides better accuracy. Additionally, we have seen some variation between our multiple PCB vendors in resistance of the PCB. With this new calculation method and variation in PCB resistance, we are changing the specified value for Rout on the VTM48EH015T050A00(VIV0102THJ) product. The table below highlights the change in Rout. Output Resistance (Cold) Min 1.20 Typ Old 1.3 Typ New 1.5 Max Old 1.5 Max New 1.8 Output Resistance (Ambient) 1.52 1.7 1.8 1.9 2.2 Output Resistance (Hot) 1.91 2.1 2.2 2.3 2.5 Products Affected / Schedule: VTM48EH015T050A00(VIV0102THJ) The change is effective immediately. Action Required: Reevaluate designs to ensure consistency with new Rout values. Technical Marketing contact: Christina Ocasio V•I Chip Inc. 25 Frontage Road Andover, MA 01810 (978) 749-3334 [email protected] V.I Chip Inc. (a Vicor Company), 25 Frontage Road, Andover MA01810, Tel: (978) 470-2900, FAX: (978) 475-6715 p1/1