Rev. 1.2, 2014-07-03
resistor divider. The power-on reset delay time can be programmed by the external delay capacitor. The additional
sense comparator provides an early warning function: Any voltage (e.g. the input voltage) can be monitored, an
under-voltage condition is indicated by setting the comparator’s output to low. The TLE42994GM (PG-DSO-14
package) and TLE42994E (PG-SSOP-14 exposed pad package) include additionally an Enable function
permitting enabling/disabling the regulator. In case the regulator is disabled it consumes less current than 1 µA.
Dimensioning Information on External Components
The input capacitor
I is recommended for compensation of line influences. The output capacitor CQ is necessary
for the stability of the control loop.
The control amplifier compares a reference voltage to a voltage that is proportional to the output voltage and drives
the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any
oversaturation of the power element. The component also has a number of internal circuits for protection against: