TIOS101 Datasheet, PDF (10/26 Pages) Texas Instruments – Digital Sensor Output Drivers with Integrated Surge Protection

TIOS101
SLLSEV6 – JULY 2017
www.ti.com
8.3 Feature Description
8.3.1 Current Limit Configuration
The output current can be configured with an internal resistor on ILIM_ADJ pin. The maximum settable current
limit is 300 mA. This maximum setting specifies a minimum of 300 mA over temperature and voltage.
Output disable due to current fault and current fault auto recovery features can be disabled by floating ILIM_ADJ
pin. However, the current fault indication is still active in this configuration. This feature is useful when driving
large capacitances.
ILIM_ADJ Pin Condition
R_SET resistor to GND
Connected to GND
OPEN
Table 1. Current Limitation
OUT Current Limit
Variable
300 mA
300 mA
NFAULT Indication During
Fault
Yes
Yes
Yes
Output Disable and Auto
Recovery
Yes
Yes
No
8.3.2 Current Fault Detection, Indication and Auto Recovery
If the output current at OUT exceeds the internally set current limit I_O(LIM) for a duration longer than t_SC, the
NFAULT pin is driven logic low to indicate a fault condition. The output is turned off, but the LDO continues to
function. The output periodically retries to check if the output is still in the over current condition. In this mode,
the output is switched on for t_SC in t_SCEN intervals. Current fault auto recovery mode can be disabled by setting
ILIM_ADJ = OPEN. See Table 3.Toggling EN will clear NFAULT.
8.3.3 Thermal Warning, Thermal Shutdown
If the die temperature exceeds T_(WRN), the NFAULT flag is held low indicating a potential over temperature
problem. When the T_J exceeds T_(SDN), The output is disabled but the LDO remains operational. As soon as the
temperature drops below the temperature threshold (and after T_(HYS)), the internal circuit re-enables the driver,
subject to the state of the EN and IN pins.
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