ACE3555R

1CH ADJ Current-Limited Power Distribution Switch

VER 1.1

9

Thermal Protection

If the current limit block starts to regulate the output current, the power loss on power MOSFET will cause

the IC temperature rise. The die temperature is internally monitored until the thermal limit is reached.

Once this temperature is reached, the switch will turn off to allow the chip to cool until the over

temperature fault remove. The over temperature threshold is 130℃ and hysteresis is 20℃.

Under-voltage Lockout (UVLO)

This circuit is used to monitor the input voltage to ensure that the ACE3555R is operating correctly. This

UVLO circuit also ensures that there is no operation until the input voltage reaches the minimum spec.

Reverse Current Blocking

In case the output is pulled higher than the input voltage under the shutdown, the ACE3555R can block

the current flowing from the output to the input. This prevents damage to devices on the input side of the

ACE3555R by preventing significant current from sinking into the input capacitance.

Output Discharge

ACE3555R has output discharge function. It can discharge the output capacitor by internal pulldown

resistance during shutdown.