8.3 Feature Description

8.3.1 Current Limit Configuration

The output current can be configured with an external resistor on ILIM_ADJ pin. The highest current limit setting

with an external resistor of 10 kΩ specifies a minimum of 300 mA over the operating temperature and voltage

range.

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 capacitance.

When the ILIM_ADJ pin is shorted to ground, the TIOS102(x) is configured to source or sink a minimum of 500

mA. In this mode, current fault indication is disabled. Output Disable and Auto Recovery feature is also disabled

in this mode. The driver is disabled if the power dissipation in the device causes the junction temperature to

reach T(SDN).

Table 8-1. Current Limitation

ILIM_ADJ Pin Condition

OUT Current Limit

(Min.)

NFAULT Indication Due to

Current Fault

Output Disable and Auto

Recovery

RSET resistor to GND

(RSET: 10 kΩ to 110 kΩ)

Variable

(35 mA to 300 mA)

Yes

Yes

Connected to GND (RSET 0 to 5

kΩ)

500 mA

No

No

OPEN

260 mA

Yes

No

8.3.2 Current Fault Detection, Indication and Auto Recovery

If the output current at OUT exceeds the internally set current limit IO(LIM) for a duration longer than tSC, 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 tSC in tSCEN intervals. Current fault auto recovery mode can be disabled by setting

ILIM_ADJ = OPEN or GND. See Table 8-3. 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 TJ 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.

TIOS102, TIOS1023, TIOS1025

SLLSFL4A – FEBRUARY 2022 – REVISED DECEMBER 2022

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