EN Threshold discrepancy in Datasheet for Power LDO (ADP123 and ADP222)

Question

There is some discrepancy in EN Threshold for ADP123. 
 
 In regulator datasheet, two different values have been mentioned for EN Threshold. 
 In our design, VIN is 5V. 
 
 In specifications, EN Threshold is 1.2V 
 
 2. In Fig 36 (Typical EN pin Threshold Vs Input Voltage) Graph, For 5V input, EN Threshold is 1.1V 
 I would like to know EN Threshold for ADP123 and ADP222

ADIApproved · Accepted Answer

Hi Likitha, 
 I believe the 1.2V in the specifications provides a margin for the EN threshold. The regulator might turn on at EN=1.1V but it's better to pull it up at a voltage level of 1.2V or higher. 
 I think the case is similar with ADP222. You should pull it up to higher than 1.2V but take note of the abs max rating of 6V.)

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EN Threshold discrepancy in Datasheet for Power LDO (ADP123 and ADP222)

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