TLE4263-2ES 查看數據表（PDF） - Infineon Technologies

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TLE4263-2ES

5-V Low Dropout Voltage Regulator

Infineon Technologies 

TLE4263-2ES

Application Information

with

• CD: capacitance of the delay capacitor to be chosen

• trd,new: desired power-on reset delay time

• trd: power-on reset delay time specified in this datasheet

For a precise calculation also take the delay capacitor’s tolerance into consideration.

Reset Adjust Function

The undervoltage reset switching threshold can be adjusted according to the application’s needs by connecting

an external voltage divider (RADJ1, RADJ2) at pin RADJ. For selecting the default threshold connect pin RADJ to

GND.

When dimensioning the voltage divider, take into consideration that there will be an additional current constantly

flowing through the resistors.

With a voltage divider connected, the reset switching threshold VRT,new is calculated as follows:

VRT, new

=

R-----A---D----J--,--1----+-----R----A----D----J--,--2-

RADJ, 2

×

V R A D J,

th

(1)

with

• VRT,new: the desired new reset switching threshold

• RADJ1, RADJ2: resistors of the external voltage divider

VRADJ,th: reset adjust switching threshold given in “Reset Function” on Page 13

Data Sheet

18

Rev. 1.0, 2008-04-21

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