ZHCSU10P March 2000 – February 2025 LP2981-N
PRODUCTION DATA
The internal current-limit circuit protects the LDO against high-load current faults or shorting events. The LDO is not designed to operate in a steady-state current limit. During a current-limit event, the LDO sources constant current. Therefore, the output voltage falls when load impedance decreases. If a current limit occurs and the resulting output voltage is low, excessive power is potentially dissipated across the LDO, resulting in a thermal shutdown of the output. A foldback feature limits the short-circuit current to protect the regulator from damage under all load conditions. If OUT is forced below 0V before EN goes high and the load current required exceeds the foldback current limit, the device potentially does not start up correctly.