Hi team,
In the customer's system, over-current protection works every powering-up of their system. The customer has a concern of the degradation or destruction of the device if the over-current protection works every time at powering-up. The over-current is max 992mA. Do you think what over-current protection works every time at power-up reaches to the destruction?
Regards,
Jun
Hi Jun,
From your description it sounds like you are experiencing inrush current. Keep in mind that our maximum current limit is 860 mA for TLV700.
Inrush current is the additional current that will flow through the LDO at startup to charge the output capacitors. Inrush current is considered normal and can temporarily exceed the current limit of the LDO as it takes a finite amount of time for the current limit circuitry to engage. Since TLV700 has a "brick-wall" current limit, the LDO will continue charging the output capacitors after current limit engages.
Current limit is for fault protection and is not intended for normal operation. As such, the amount of time operating in current limit should be minimized. Since it is the inrush current which is engaging current limit at startup, you can reduce the time you are in current limit by reducing the output capacitance.
Very Respectfully,
Ryan
