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OPERATIONAL EXPLANATION

<Short-Circuit Protection>

The XC6216/XE6216 series includes a current fold-back circuit as a short circuit protection. When the load current reaches

the current limit level, the current fold-back circuit operates and output voltage drops. The output voltage drops further and

output current decreases. When the output pin is shorted, a current of about 30mA flows.

<CE Pin>

The IC’s internal circuitry can be shutdown via the signal from the CE pin with the XC6216/XE6216 series. In shutdown

is ‘High Active/No pull down’, operations will become unstable with the CE pin open. We suggest that you use this IC with

operational logic is fixed and the IC will operate normally. However, supply current may increase as a result of through

current in the IC’s internal circuitry if a medium voltage is applied.

<Thermal Shutdown>

When the junction temperature of the built-in driver transistor reaches the temperature limit level (150℃ TYP.), the thermal

shutdown circuit operates and the driver transistor will be set to OFF. The IC resumes its operation when the thermal

shutdown function is released and the IC’s operation is automatically restored because the junction temperature drops to the

level of the thermal shutdown release voltage.

<Minimum Operating Voltage>

For the stable operation of the IC, over 2.0V of input voltage is necessary. The output voltage may not be generated

normally if the input voltage is less than 2.0V.

<Output Voltage Control>

The voltage divided by resistors R11 & R12 is compared with the internal reference voltage by the error amplifier. The

protect circuit operate in relation to the level of output current and heat dissipation. Further, the IC’s internal circuitry

can be shutdown via the CE pin’s signal.