Datasheet

TLV61225

SLVSAF0 –AUGUST 2010

www.ti.com

Undervoltage Lockout

An implemented undervoltage lockout function (UVLO) stops the operation of the converter if the input voltage

drops below the typical undervoltage lockout threshold. This function is implemented in order to prevent

malfunctioning of the converter and protect batteries against deep discharge.

Overvoltage Protection

If, for any reason, the output voltage is not fed back properly to the input of the voltage amplifier, control of the

output voltage will not work anymore. Therefore overvoltage protection is implemented to avoid the output

voltage exceeding critical values for the device and possibly for the system it is supplying. For this protection the

TLV61225 output voltage is also monitored internally. In case it reaches the internally programmed threshold the

voltage amplifier regulates the output voltage to this value.

Overtemperature Protection

The device has a built-in temperature sensor which monitors the internal IC junction temperature. If the

temperature exceeds the programmed threshold (see electrical characteristics table), the device stops operating.

As soon as the IC temperature has decreased below the programmed threshold, it starts operating again. To

prevent unstable operation close to the region of overtemperature threshold, a built-in hysteresis is implemented.