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Rev.1.1 Sep.20, 2019

AX1117C



PIN ASSIGNMENT

The packages of AX1117C is SOT223-3L; the pin assignment is given by:

VIN

VOUT

Adj (GND)

Tab is Vout

( Top View )

3

2

1

SOT223

Name

Description

Adj

(GND)

A resistor divider from this pin to the VOUT

pin and ground sets the output voltage.

(Ground only for Fixed-Mode)

VOUT

The output of the regulator. (Note1,2)

VIN

The input pin of 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

dropout voltage during the load transient

response. This pin must always be 1.5V

higher than VOUT in order for the device to

regulate properly. (Note1)

Note1: To prevent oscillation, a 0.2uF minimum X7R or X5R dielectric is strongly recommended if ceramics are used as

output capacitors.

Note2:

A minimum of 3.3uF EL capacitor to 100uF (10mΩ ≤ ESR ≤ 1Ω) must be connected from this pin

to ground to insure stability.