TLE42994 Datasheet, PDF (2/30 Pages) Infineon Technologies AG – Low Dropout Fixed Voltage Regulator

TLE42994
Overview
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 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 C_I is recommended for compensation of line influences. The output capacitor C_Q 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
2
Rev. 1.1, 2009-05-19