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TPS7A19: insufficient/erroneous description of PG function in datasheet

Part Number: TPS7A19

Based on previous discussion - https://e2e.ti.com/support/power-management/f/196/p/892541/3300249#3300249 - non-functional PG of TPS7A19 below 1.7Vin is feature, not error.

Ok, but in that case the Figure 12 in datasheet is incorrect. (SBVS256A –MAY 2016–REVISED SEPTEMBER 2016)

  1. When the supply voltage rising - in the range from 0 to 1.7V the PG will be inoperative and therefore voltage on PG pin will track Vin (when pull-up on PG is powered from Vin) or other voltage (when pull-up on PG is powered from some other source)
  2. Behavior in case of Vin drops will likely depend on minimal Vin voltage during drop, because UVLO probably directly affects PG function.

These inaccuracies in the datasheet may seem insignificant, but are very important when PG is used in controlling the start sequence of power sources. Let me point out that such PG behavior was not always usual because many TI power sources use JFET on PG pin, and PG logic is functional independetly on Vin. 

Have a nice day

JZ