Output Current (A)

0

1

2

3

4

5

6

70

75

80

85

90

95

100

Figure 8-4. Efficiency Increase With External Bias

Output Current (A)

0

1

2

3

4

5

6

70

75

80

85

90

95

100

Figure 8-5. Efficiency Increase With External Bias

8.3.10 Overcurrent Protection (OCP)

The TLVM13660 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 TLVM13660 employs hiccup overcurrent protection if there is an extreme overload. In hiccup mode, the

TLVM13660 module is shut down and kept off for 80 ms (typical) before a restart is attempted. 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, thus preventing overheating and potential

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

operation.

8.3.11 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 168°C (typical) to

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

TLVM13660 attempts to restart when the junction temperature falls to 158°C (typical).

8.4 Device Functional Modes

8.4.1 Shutdown Mode

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 TLVM13660 also employs internal undervoltage protection. If the

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

8.4.2 Standby Mode

above 1.1 V (maximum) and below the precision enable threshold of 1.263 V (typical), the internal LDO is on and

8.4.3 Active Mode

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

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TLVM13660

SLVSGJ6 – APRIL 2022

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