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XC8110/XC8111

Series

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OPERATIONAL EXPLANATION

<Startup mode / Inrush current prevention function>

During forward bias, changing the CE pin from an “L” voltage to an “H” voltage will operate the inrush current prevention function

and raise the output voltage.

The operation of the inrush current prevention function and output voltage rise will be as described below.

(1) Over a duration of 500μs (TYP.), the current supplied from the input to the output via the internal switch will be limited to

approximately 150mA.

(2) After (1), over an additional duration of 650μs (TYP.), the current supplied from the input to the output via the internal switch

will be limited to ILIM.

*For the XC8110, ILIM is 850mA (TYP.), and for the XC8111 it is 1700mA (TYP.).

(3) After the durations of (1) and (2) have ended, or when the difference between the VOUT pin voltage and VIN pin voltage

becomes equal to or lower than 50mV, the operation will shift from Startup mode to Normal mode.

As the output capacitor is large-capacity, or during heavy loads

When a large-capacity output capacitor is used, or a heavy load is applied during startup, the output voltage will not rise during

Startup mode, and operation will shift from Startup mode to Normal mode.

After shifting to Normal mode, the over current limit function will be operated to raise the output voltage.

150mA

CE

VOUT

Input Current

0V

0V

0A

VCEH

VIN

VIN-50mV

500μs

650μs

Start-up Mode

Normal Operation

ILIM : 850mA (XC8110)

1700mA (XC8111)

150mA

CE

VOUT

Input Current

0V

0V

0A

VCEH

VIN

ILIM : 850mA (XC8110)

1700mA (XC8111)

500μs

650μs

Start-up Mode

Normal Operation