TLE4263-2ES Просмотр технического описания (PDF) - Infineon Technologies

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производитель

TLE4263-2ES

5-V Low Dropout Voltage Regulator

Infineon Technologies 

6.2

Watchdog

VW

TLE4263-2ES

Application Information

VD

VDU

VDWL

VRO

t

No positive

VW edge

tWI,tr

TWI,p

t

tWD,L

tWD,L

VRO,l

Ti mi n g Di a g ra m_ Wa tch d o g .vsd

t

Figure 5 Timing of the Watchdog Function Reset

Watchdog Timing

The period of the watchdog pulses has to be smaller than the minimum watchdog trigger time which is set by the

external reset delay capacitor CD. Use the following formula for dimensioning CD:

CD

=

T-----W----I--,-t-r--,-n---e--w--

TWI,tr

×

100

nF

(2)

with

• CD: capacitance of the delay capacitor to be chosen

• TWI,tr,new: desired watchdog trigger time

• TWI,tr: watchdog trigger time specified in this data sheet

Data Sheet

19

Rev. 1.0, 2008-04-21

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