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TPS562210, TPS563210

www.ti.com

SLVSCM6A – FEBRUARY 2015 – REVISED AUGUST 2015

Feature Description (continued)

8.3.6 UVLO Protection

Under voltage lock out protection (UVLO) monitors the internal regulator voltage. When the voltage is lower than

UVLO threshold voltage, the device is shut off. This protection is non-latching.

8.3.7 Thermal Shutdown

The device monitors the temperature of itself. If the temperature exceeds the threshold value (typically 155°C),

the device is shut off. This is a non-latch protection.

8.4 Device Functional Modes

8.4.1 Advanced Eco-Mode™ Control

The TPS562210 and TPS563210 are designed with Advanced Eco-mode™ to maintain high light load efficiency.

As the output current decreases from heavy load condition, the inductor current is also reduced and eventually

comes to point that its rippled valley touches zero level, which is the boundary between continuous conduction

and discontinuous conduction modes. The rectifying MOSFET is turned off when the zero inductor current is

detected. As the load current further decreases the converter runs into discontinuous conduction mode. The on-

time is kept almost the same as it was in the continuous conduction mode so that it takes longer time to

discharge the output capacitor with smaller load current to the level of the reference voltage. This makes the

switching frequency lower, proportional to the load current, and keeps the light load efficiency high. The transition

(2)

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