Product Change Notice Notice: #120713 Date: JUL 13 2012 To Our Valued Customers: We appreciate your use of VI Chip products. Our commitment to customer satisfaction is demonstrated by our notification to you of the following change. Description: VI Chip VTM reverse inrush protection functionality has been standardized across the whole portfolio. The half-chip VTMs referenced below have been brought in line with the range. Reverse inrush protection inhibits the flow of current in the reverse direction (output to input) of a VTM during the startup phase. This feature is important in applications where sensitive electronics in the system may react negatively to a dV/dt caused in the system by the rapid discharge of capacitive stored energy on the output of a VTM. Reverse Inrush Protection (RIP) prevents the rapid discharge of this stored energy by preventing reverse current flow, thereby keeping the stored charge on the secondary side of the VTM. As updated, the VTM will function bi-directionally when enabled. Product datasheets have been updated to reflect the change and the relevant section (16) is included in this PCN as an appendix (old and new versions shown). Products Affected: Half-chip VTMs with 1.5V, 2V nominal output: VIV0102THJ VIV0103THJ VTM48EF015T050A00 VTM48EF020T040A00 Schedule / Datecodes: Parts shipped from 10 JUN 2012 (marked with week code 1224) have the updated function. Action Required: Vicor does not expect any change in customer application performance. However customers may like to verify that operation is consistent. Technical Contact: Ian Mazsa 25 Frontage Road Andover, MA 01810 Vicor, 25 Frontage Road, Andover MA01810, Tel: (978) 470-2900, FAX: (978) 475-6715 p1/2 Appendix: Revised description of Reverse Operation Original description of Reverse Current Protection Vicor, 25 Frontage Road, Andover MA01810, Tel: (978) 470-2900, FAX: (978) 475-6715 p2/2