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AN2808 Datasheet(PDF) 33 Page - STMicroelectronics

Part # AN2808
Description  The PM6670S device is a complete
PDF  40 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2808 Datasheet(HTML) 33 Page - STMicroelectronics

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AN2808
PM6670S evaluation tests
33/40
Figure 39.
VTT current vs temperature, IVTT = 1.5 A
(g)
10.12
DDR memories (VDDQ = 2.5 V) characterization
The PM6670S is also suitable for DDR memories with a VDDQ rail equal to 2.5 V. The VTT
linear regulator is always tracking VTTREF, a buffered replica of the VDDQ half, so the
termination rail is equal to 1.25 V as required by the DDR JEDEC standards (JESD79 and
JESD8-9 specifications).
The following graphs show each rail load regulation.
g.
Average IC temperature = 67.9° C. Maximum internal IC temperature = 86.9° C.



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