ISL6123 Datasheet, PDF (21/23 Pages) Intersil Corporation – Power Sequencing Controllers

ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128, ISL6130
DLY_X Threshold Voltage and Charging
Current Mismatch
The two other error sources come from the IC itself and are found
across the four DLY_X outputs. These errors are the DLY_X
threshold voltage (DLY_Vth) variance when the GATE_X charging
and discharging current latches are set, and the DLY_X charging
current (DLY_ichg) variances to determine the time to next
sequencing event. Both of these parameters are bounded by
specification. Figure 29 shows that, with a common capacitor,
the typical error contributed by these factors is insignificant,
since both DLY_X traces overlay each other.
FIGURE 29. DLY_VTH AND DLY_ICHG TIMING MISMATCH
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21
FN9005.11
August 25, 2011