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LTC2625 voltage head room with respect to GND

Question asked by on Jul 11, 2018
Latest reply on Jul 12, 2018 by Clarence.Mayott

In the datasheet, voltage headromm is described as follows.


When drawing a load current from either rail, the output
voltage headroom with respect to that rail is limited by
the 30Ω typical channel resistance of the output devices;
e.g., when sinking 1mA, the minimum output voltage =
30Ω • 1mA = 30mV. See the graph Headroom at Rails vs
Output Current in the Typical Performance Characteristics


what is the maximum value of the output headroom to GND, when the output sink the current?