TLV70012A-Q1, TLV70025-Q1, TLV70028-Q1

TLV70030-Q1, TLV70032-Q1, TLV70033-Q1

SLVSA61F – FEBRUARY 2010 – REVISED AUGUST 2013

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This effect is shown in Figure 13 in the Typical Characteristics section.

Transient Response

As with any regulator, increasing the size of the output capacitor reduces over-/undershoot magnitude but

increases the duration of the transient response.

Undervoltage Lockout (UVLO)

The TLV700xx-Q1 uses an undervoltage lockout circuit to keep the output shut off until internal circuitry is

operating properly.

Thermal Information

Thermal protection disables the output when the junction temperature rises to approximately 160°C, allowing the

device to cool. When the junction temperature cools to approximately 140°C, the output circuitry is again

enabled. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection

circuit may cycle on and off. This cycling limits the dissipation of the regulator, protecting it from damage as a

result of overheating.

Any tendency to activate the thermal protection circuit indicates excessive power dissipation or an inadequate

heatsink. For reliable operation, junction temperature should be limited to 125°C maximum. To estimate the

margin of safety in a complete design (including heatsink), increase the ambient temperature until the thermal

protection is triggered; use worst-case loads and signal conditions. For good reliability, thermal protection should

trigger at least 35°C above the maximum expected ambient condition of the particular application. This

configuration produces a worst-case junction temperature of 125°C at the highest expected ambient temperature

and worst-case load.

The internal protection circuitry of the TLV700xx-Q1 has been designed to protect against overload conditions. It

was not intended to replace proper heatsinking. Continuously running the TLV700xx-Q1 into thermal shutdown

degrades device reliability.

10

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