Figure 9-6 shows the immediate current limit switch off behavior. The diagram also illustrates the retry behavior. As shown, the switch will remain latched off until the LATCH pin is low.

Figure 9-6 Current Limit – Version A and B - Latched Behavior

Figure 9-7 shows the immediate current limit switch off behavior. In this example, LATCH is tied to GND; hence, the switch will retry after the fault is cleared and t_RETRY has expired.

Figure 9-7 Current Limit - Version A and B - LATCH = 0

Figure 9-8 shows the active current behavior of version C. In version C, the switch will not shutdown until thermal shutdown is reached.

Figure 9-8 Current Limit – Version C - Latched Behavior

Figure 9-9 shows the active current behavior of version C. The switch will not shutdown until thermal shutdown is tripped. In this example, LATCH is tied to GND.

Figure 9-9 Current Limit – Version C - LATCH = 0

When the switch retries after a shutdown event, the SNS fault indication will remain until V_OUT has risen to V_BB – 1.8 V. After V_OUT has risen, the SNS fault indication is reset and current sensing is available. If there is a short-to-ground and V_OUT is not able to rise, the SNS fault indication will remain indefinitely. Figure 9-10 illustrates auto-retry behavior and provides a zoomed-in view of the fault indication during retry.

Figure 9-10 Fault Indication During Retry