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■OPERATIONAL EXPLANATION(Continued)

<Soft-start function>

The output voltage of XC9268 rises with soft start by slowly raising the reference voltage. The rise time of this reference

capacitor and a resistor to the EN / SS pin whichever is later.

<Thermal shutdown>

The thermal shutdown (TSD) as an over temperature limit is built in the XC9268 series.

When the junction temperature reaches the detection temperature, the driver transistor is forcibly turned off. When the junction

temperature falls to the release temperature while in the output stop state, restart takes place by soft-start.

<UVLO>

released, the soft-start function activates, and output start operation begins. Stopping by UVLO is not shutdown; only pulse

output is stopped and the internal circuits continue to operate.

<Power good>

On USP-6C Package, the output state can be monitored using the power good function. The PG pin is an Nch open drain

output, therefore a pull-

up resistance (approx. 100kΩ) must be connected to the PG pin.

CONDITIONS

SIGNAL

EN/SS=H

H (High impedance)

L (Low impedance)

Thermal Shutdown

L (Low impedance)

Undefined State

EN/SS=L

Stand-by

L (Low impedance)