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| TLE42994_14 Datasheet, PDF (3/36 Pages) Infineon Technologies AG – Extreme Low Current Consumption In ON State | |||
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TLE42994
Overview
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 comparatorâs 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 CI is recommended for compensation of line influences. The output capacitor CQ is necessary
for the stability of the control loop.
Circuit Description
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:
⢠Overload
⢠Overtemperature
⢠Reverse polarity
Data Sheet
3
Rev. 1.2, 2014-07-03
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