For this explanation, refer to the MAX16006 datasheet, page 6, TOC7. "Input Overdrive" is defined as the voltage difference between the configured undervoltage threshold and a transient pulse on the voltage rail.
MAX16006
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The MAX16000–MAX16007 are low-voltage, quad-/hex-/octal-voltage µP supervisors in small TQFN and TSSOP packages. These devices provide supervisory functions...
Datasheet
MAX16006 on Analog.com
For this explanation, refer to the MAX16006 datasheet, page 6, TOC7. "Input Overdrive" is defined as the voltage difference between the configured undervoltage threshold and a transient pulse on the voltage rail. For example, if the threshold is 2V and the input goes down to 1.990V, the input overdrive is 10mV.