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Enpirion Power Datasheet ES1021QI Power Sequencing Controller

July 2014

Altera Corporation

Application Considerations

Timing Error Sources

In any system there are variance contributors. For ES1021QI, timing errors are mainly contributed by three sources.

Capacitor Timing Mismatch Error

Obviously, the absolute capacitor value is an error source; thus, lower-percentage tolerance capacitors help to reduce

this error source. Figure 8 illustrates a difference of 0.57ms between two DLY_X outputs ramping to DLY_X threshold

voltage. These 5% capacitors were from a common source. In applications where two or more GATEs or LOGIC

outputs must have concurrent transitions, it is recommended that a common GATE drive be used to eliminate this

timing error.

FIGURE 8. CAPACITOR TIMING MISMATCH

10128

July 9, 2014

Rev A