5.5
IOVDD - overvoltage detection and undervoltage detection
The IOVDD pin is the supply voltage input for the communication interface towards the microcontroller. The pin
can be supplied from one of the voltages generated by the TLF30681QVS01.
The TLF30681QVS01 monitors the voltage on the IOVDD pin. An overvoltage event or an undervoltage event
triggers a reset and pulls ROT to GND. As long as no reset event occurs, ROT is "high" (
V
IOVDD
) due to an internal
pull-up resistor and follows
V
IOVDD
.
shows an example of various events with delay and deglitching
times.
In addition the TLF30681QVS01 also features a short-to-ground detection for the IOVDD voltage. If the IOVDD
voltage is below the undervoltage threshold for a period longer the short-to-ground detection time, then the
device generates a short-to-ground event. A short-to-ground event on IOVDD triggers a hard reset in the device
and the
ROT
V
IOVDD
1 V
V
IOVDD,OV
V
IOVDD,UV
t
t
t
RD
t
RD
t
RD
t
IOVDD,deg
t
IOVDD,deg
Figure 7
Overvoltage detection and undervoltage detection
5.5.1
Electrical characteristics IOVDD - overvoltage detection and
undervoltage detection
Table 13
Electrical characteristics IOVDD - overvoltage detection and undervoltage detection
T
j
= -40°C to 150°C;
V
R1VSx
= 3.7 V to 35 V; all voltages with respect to ground, positive current flowing into pin
(unless otherwise specified)
Parameter
Symbol
Values
Unit
Note or condition Number
Min.
Typ.
Max.
IOVDD - overvoltage
threshold
V
IOVDD,OV
5.5
–
5.8
V
–
P_5.6.1
IOVDD - overvoltage
hysteresis
V
IOVDD,OV,Hys
0.4
–
2.25
%
–
P_5.6.2
IOVDD - undervoltage
threshold
V
IOVDD,UV
2.74
–
2.86
V
–
P_5.6.3
OPTIREG
™
PMIC TLF30681QVS01
Power management IC
Central functions
Datasheet
45
Rev. 1.0
2020-04-08
