SLVSE17A May 2019 – April 2020 TPS1HB16-Q1
All timing diagrams assume that the SEL1 pin is low.
The LATCH, DIA_EN, and EN pins are controlled by the user. The timing diagrams represent a possible use-case.
Figure 36 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 37 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 tRETRY has expired.
When the switch retries after a shutdown event, the SNS fault indication will remain until VOUT has risen to VBB – 1.8 V. Once VOUT has risen, the SNS fault indication is reset and current sensing is available. If there is a short-to-ground and VOUT is not able to rise, the SNS fault indication will remain indefinitely. Figure 38 illustrates auto-retry behavior and provides a zoomed-in view of the fault indication during retry.
Figure 38 assumes that tRETRY has expired by the time that TJ reaches the hysteresis threshold.
LATCH = 0 V and DIA_EN = 5 V