TLE4262 Просмотр технического описания (PDF) - Infineon Technologies

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TLE4262

5-V Low Drop Voltage Regulator

Infineon Technologies 

TLE 4262

VΙ

VQ

VD

t rd

t rr

VRO

t

< t rr

V Q, rt

dV

dt

=

Ι D,c

CD

t

V DU

V DRL

t

Power-on-Reset

Thermal

Shutdown

Voltage Dip

at Input

Undervoltage Secondary Overload

Spike at Output

t

AED03010

Figure 5 Time Response

Reset Timing

The power-on reset delay time is defined by the charging time of an external capacitor

CD which can be calculated as follows:

CD = (∆trd × ID,c)/∆V

(1)

Definitions:

• CD = delay capacitor

• ∆trd = delay time

• ID,c = charge current, typical 10 µA

• ∆V = VDU, typical 1.8 V

• VDU = upper delay switching threshold at CD for reset delay time

Data Sheet

9

Rev. 2.8, 2008-05-19

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