ISL70001SEH, ISL70001SRH VOUT Power-Up/Down Glitch Problem Report
This technical brief explains the GIDEP Problem Advisory BP6-P-16-01 issued for the ISL70001SEH, ISL70001SRH devices.
The ISL70001SRH and ISL70001SEH can exhibit a V-OUT response during a power-up or power-down period when V-IN is between 1.3V and 1.8V. This range of V-IN is below the nominal V-IN POR threshold of approximately 2.65V for PORSEL set to ground and 4.1V for PORSEL set to V-IN. For V-IN ramps of faster than 10V/ms this anomalous output activity is not possible, however, for slower V-IN ramps there is the possibility of output activity. During power-up, V-OUT follows a normal soft-start behavior, which will not exceed the V-OUT set-point voltage. During power-down V-IN ramp the activity again will not exceed the set-point voltage. The size of the anomalous V-OUT response is inversely related to the ramp rate of VIN as this sets how long the part is in the anomalous activity range. See Figure 1 for an illustration of the issue. This problem has been fixed on the ISL70001ASEH.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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April 21, 2016 |
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TB504.0 |
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1.5 MB |
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