TLE4299 Datasheet, PDF (15/22 Pages) Infineon Technologies AG – 5-V Low-Drop Fixed Voltage Regulator

TLE 4299
V_I
V_Q
V _RT
V_D
V _UD
V _LD
V _RO
t_d
V_{RO, SAT}
Power-on-Reset
t _RR
Thermal
Shutdown
t
< t _RR
dV
dt
=
I_D
C_D
t
t
Voltage Dip
at Input
Undervoltage
Secondary Overload
Spike at Output
t
AED03107
Figure 8 Reset Timing Diagram
The reset output is an open collector output with a pull-up resistor of typical 20 kW to Q.
An external pull-up can be added with a resistor value of at least 5.6 kW.
In addition the reset switching threshold can be adjusted by an external voltage divider.
The feature is useful for microprocessors which guarantee safe operation down to
voltages below the internally set reset threshold of 4.65 V typical.
If the internal used reset threshold of typical 4.65 V is used, the pin RADJ has to be
connected to GND.
If a lower reset threshold is required by the system, a voltage divider defines the reset
threshold V_Rth between 3.5 V and 4.60 V:
V_Rth = V_{RADJ TH} ´ (R_ADJ1 + R_ADJ2) / R_ADJ2
[3]
V_{RADJ TH} is typical 1.36 V.
Data Sheet Rev. 1.0
15
2002-01-17