Hello all,
Does anyone know if DDR SDRAM modules (or similar modulars) use internal charge pumps (to boost up the power supply of core modules)? The reason why I ask is that I am interested in DDR SDRAM's leakage current values. Someone mentioned (in another ng) that there may internal charge pumps. Hence, if there is a CP in the DDR SDRAM, killing the clock and grounding/vdding all other data inputs will not
*make* the leakage current drop to the *correct* order of magnitude, if the CP is enabled and has its own local (ring) oscillator. *Correct* order of magnitude (for a typical IC) being sub-uAs.If anyone knows of a typical value of the LEAKAGE CURRENT of DDR SDRAM module, it will be much appreciated. In datasheets, I was only able to locate the MAXIMUM INPUT LEAKAGE CURRENT parameter ([-5uA to +5uA]).
P.S If a DDR SDRAM DIMM has 184 pins and most of the pins are data pins, then the TOTAL INPUT LEAKAGE CURRENT can accumulate up to ~920uA (theoretically). This is a pretty impressive leakage conssumption! Can this be rigth ?
Please advise
-Roger