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7.3.8 Overcurrent Protection (OCP)

The TLVM13630 is protected from overcurrent conditions using cycle-by-cycle current limiting of the peak

inductor current. The current is compared every switching cycle to the current limit threshold. During an

overcurrent condition, the output voltage decreases.

The TLVM13630 employs hiccup overcurrent protection if there is an extreme overload. In Hiccup mode,

the regulator is shut down and kept off for 80 ms (typical) before the TLVM13630 tries to start again. If an

overcurrent or short-circuit fault condition still exists, hiccup repeats until the fault condition is removed. Hiccup

mode reduces power dissipation under severe overcurrent conditions, and prevents overheating and potential

damage to the device. Once the fault is removed, the module automatically recovers and returns to normal

operation.

7.3.9 Thermal Shutdown

Thermal shutdown is an integrated self-protection used to limit junction temperature and prevent damage related

to overheating. Thermal shutdown turns off the device when the junction temperature exceeds 165°C (typical) to

prevent further power dissipation and temperature rise. Junction temperature decreases after shutdown, and the

TLVM13630 attempts to restart when the junction temperature falls to 155°C (typical).

7.4 Device Functional Modes

7.4.1 Shutdown Mode

The EN pin provides ON and OFF control for the TLVM13630. When VEN is below approximately 0.4 V, the

device is in Shutdown mode. Both the internal LDO and the switching regulator are off. The quiescent current in

Shutdown mode drops to 0.6 µA (typical). The TLVM13630 also employs internal undervoltage protection. If the

input voltage is below its UV threshold, the regulator remains off.

7.4.2 Standby Mode

The internal LDO has a lower enable threshold than the regulator itself. When VEN is above 1.1 V (maximum)

and below the precision enable threshold of 1.263 V (typical), the internal LDO is on and regulating. The

precision enable circuitry is turned on once the internal VCC is above its UVLO threshold. The switching action

and voltage regulation are not enabled until VEN rises above the precision enable threshold.

7.4.3 Active Mode

The TLVM13630 is in Active mode when VIN and VEN are above their relevant thresholds and no fault conditions

are present. The simplest way to enable the operation is to connect the EN pin to VIN, which allows self start-up

when the applied input voltage exceeds the minimum start-up voltage.

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TLVM13630

SLVSFT6 – MAY 2021

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TLVM13630 Datasheet(PDF) 19 Page - Texas Instruments