ZHCSGF3B July 2017 – January 2019 TPS7A92
PRODUCTION DATA.
The internal current-limit circuit is used to protect the LDO against transient high-load current faults or shorting events. The LDO is not designed to operate in current limit under steady-state conditions. During an overcurrent event where the output voltage is pulled 10% below the regulated output voltage, the LDO sources a constant current as specified in the Electrical Characteristics table. When the output voltage falls, the amount of output current is reduced to better protect the device. During a hard short-circuit event, the current is reduced to approximately 2.2 A. See Figure 12 in the Typical Characteristics section for more information about the current-limit foldback behavior. Note also that when a current-limit event occurs, the LDO begins to heat up because of the increase in power dissipation. The increase in heat can trigger the integrated thermal shutdown protection circuit.