OPTIREG Linear TLE42994V33 3.3 V low drop fixed voltage regulator 1 Overview Features Output voltage 3.3 V 2% Output current up to 150 mA Extreme low current consumption in ON state Enable function: Below 1 A current consumption In OFF state Early warning Power-on and undervoltage reset with programmable delay time Reset low down to V = 1 V Q Adjustable reset threshold Very low dropout voltage Output current limitation Reverse polarity protection Overtemperature protection Suitable for use in automotive electronics Wide temperature range from -40C up to 150C Input voltage range from 4.4 V to 45 V Green Product (RoHS compliant) Potential applications General automotive applications. Product validation Qualified for automotive applications. Product validation according to AEC-Q100/101. Description The TLE42994V33 is a monolithic integrated low dropout voltage regulator, especially designed for automotive applications that need to be in ON state during the cars engine is turned off. An input voltage up to 45 V is regulated to an output voltage of 3.3 V. The component is able to drive loads up to 150 mA. It is short- circuit protected by the implemented current limitation and has an integrated overtemperature shutdown. A Data Sheet 1 Rev. 1.2 www.infineon.com/OPTIREG-Linear 2018-11-22 OPTIREG Linear TLE42994V33 3.3 V low drop fixed voltage regulator Overview reset signal is generated for an output voltage V of typically 3.10 V. This threshold can be decreased by an Q,rt external 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 undervoltage condition is indicated by setting the comparators output to low. Additionally, an enable function permitting enabling/disabling the regulator is also included. In case the regulator is disabled it consumes less current than 1 A. Dimensioning information on external components The input capacitor C is recommended for compensation of line influences. The output capacitor C is I Q 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 Type Package Marking TLE42994EV33 PG-SSOP-14 Exposed Pad 42994V33 TLE42994GMV33 PG-DSO-14 42994V33 Data Sheet 2 Rev. 1.2 2018-11-22