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| TLF4949 Datasheet, PDF (18/23 Pages) Infineon Technologies AG – 5V Low Drop Out Linear Voltage Regulator | |||
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Ref 1,23V
22K
OUT
VReg
2uA
D
2.0V
TLF4949
Application Information
Reset .vsd
Reset
Figure 8 Reset Circuit
The reaction time of the reset circuit corresponds to its noise immunity. Standby output voltage drops below the
reset threshold that are only marginally longer than the reaction time will result in a shorter reset delay times.
The nominal reset delay time will be generated for standby output voltage drops longer than approximately 50µs.
The typical reset output waveforms are shown in Figure 9 âTypical Reset Output Waveformsâ on Page 18.
OUT
5.0V
VRT + 0.1V
VRT
VIN
VOUT
Reset _diagram.vsd
40V
1.5V
t
tR
Reset
tRD
Switch on
tRR tRD
Input drop
Dump
Output overload
Figure 9 Typical Reset Output Waveforms
Data Sheet
18
Switch off
Rev. 1.0, 2012-05-07
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