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Q: TPS62261-Q1: Momentary minus voltage on SW node by 1878258
My customer is concerned with momentary minus voltage (-0.7V) at SW pin as shown in the below picture.
I think this is from the body diode of the low side FET when it is off, and quite a normal operation.
However, since the absolute rating at SW is specified at -0.3V, the voltage appears here violates the spec.
Please let me know how I should handle this behavior.
Or, is there anything strange?
By the way, Vin=3.3V and Vout=1.8V.
A: Re: TPS62261-Q1: Momentary minus voltage by 24596
You are correct, that is normal behavior. The -0.3 V spec comes from the process specification and is the absolute maximum DC voltage.
We also wrote this app note to better explain this spec: http://www.ti.com/lit/an/slva494/slva494.pdf It is found on the device's product page.
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