The package of AX1116 is SOT-23-5L; the pin assignment is given by:
The input pin of the regulator. Typically a large storage capacitor is
connected from this pin to ground to insure that the input voltage does
not sag below the minimum drop out voltage during the load transient
response. This pin must always be higher than VOUT by at least the
amount of the dropout voltage and some margin in order for the device
to regulate properly.
A resistor divider from this pin to the VOUT pin and ground sets the output
voltage. To minimize the error due to the error amplifier, select the
values of the resistor dividers to be less than 10KΩ.
Enable pin. A low signal or left open on this pin shuts down the output.
This pin must be tied High or to VIN for normal operation.
BP A 470p to 1000pF bypass capacitor connected to this pin reduces the
(Fixed Only) output noise.
The output of the regulator. A minimum of 2.2uF with max ESR of 1Ω
capacitor must be connected from this pin to ground to insure stability.
Ground pin. This pin must be connected to the lowest potential in the
GND system and all other pins must be at higher potential with respect to this
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Rev.1.5 Nov.09, 2010