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ADP7142 Output abnormality

Question asked by Osamu on Mar 23, 2017
Latest reply on Apr 5, 2017 by Migs

Hello.

 

When chattering occurs at startup input, LDO output will be abnormal.
Phenomenon 1  Vin = Vout
Phenomenon 2  The voltage is not set.  And VADJ voltage is not 1.2 V
                           However, even if Vin is changed, Vout becomes the previous voltage.

 

Condition :
Load is 1 to 2 mA and Max 20 mA.
Even if it is enabled and delays startup, it appears.
Cin, Cout is 2.2 uF.
The incidence is about 10%

.

Chattering occurs because of the use of the Toggle switch..
Although using ROHM LDO in parallel, output abnormality does not occur there.

How does chattering affect it?

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