The TPS272C45 integrates a dual stage adjustable current limit. For the most efficient and reliable output protection, the current limit can be set as close to the DC current level as possible. Sometimes, systems require high inrush current handling as well (example incandescent lamp and capacitive loads). By integrating a dual stage current limit, the TPS272C45 enables robust DC current limiting while still allowing flexible inrush handling.

With the adjustable current limit feature, a lower current limit setting can reduce the fault energy and the output current during a load failure event such as a short-circuit or a partial load short (soft-short). By lowering fault energy and current, the overall system improves through:

• Reduced size and cost in current carrying components such as PCB traces and module connectors
• Less disturbance at the power supply (VS pin) during a short circuit event
• Less additional budget for the power supply to account for overload currents in one channel or more
• Improved protection of the downstream load