Datasheet

TPS43330-Q1
TPS43332-Q1
www.ti.com SLVSA82E –MARCH 2011–REVISED APRIL 2013
With the boost controller enabled, a voltage less than 1.9 V (typical) on VBAT triggers an undervoltage lockout
and pulls the boost gate driver (GC1) low (this action has a filter delay of 5 µs, typical). As a result, VIN falls at a
rate dependent on its capacitor and load, eventually triggering VIN undervoltage. A short falling transient at
VBAT even lower than 2 V can thus be survived, if V
BAT
returns above 2.5 V before VIN discharges to the
undervoltage threshold.
Thermal Protection
The TPS43330-Q1 or TPS43332-Q1 protects itself from overheating using an internal thermal shutdown circuit. If
the die temperature exceeds the thermal shutdown threshold of 165ºC due to excessive power dissipation (for
example, due to fault conditions such as a short circuit at the gate drivers or VREG), the controllers turn off and
then restart when the temperature has fallen by 15ºC.
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