tle4678 Infineon Technologies Corporation, tle4678 Datasheet - Page 23

• Manufacturer Part Number: tle4678
• Description: Low Drop Out Linear Voltage Regulator 5 V Fixed Output Voltage
• Manufacturer: Infineon Technologies Corporation

8.2
Electrical Characteristics Watchdog Function
V
all voltages with respect to ground, direction of currents as shown in
Pos.
Default Watchdog Activating Threshold (pin WADJ left open)
8.2.1
8.2.2
8.2.3
Adjustable Watchdog Activating Threshold (external resistor connected to pin WADJ)
8.2.4
8.2.5
8.2.6
8.2.7
8.2.8
8.2.9
Watchdog Input WI
8.2.10
8.2.11
8.2.12
8.2.13
8.2.14
Datasheet
I
= 13.5 V,
Parameter
Watchdog Activating
Threshold
Watchdog Deactivating
Threshold
Watchdog Activating
Threshold Hysteresis
Activating Threshold
Current ratio
Internal Watchdog Adjust
Resistor
Activating Threshold Factor
Deactivating Threshold Factor
Activating Threshold
Switching Hysteresis Factor
Watchdog Input
Low Signal Valid
Watchdog Input
High Signal Valid
Watchdog Input
High Signal Pulse Length
Watchdog Input Signal
Slew Rate
Watchdog Input Signal
Frequency Capture Range
T
Electrical Characteristics Watchdog Function
j
= -40 C to +150 C,
Symbol
I
I
I
V
I
R
F
F
F
V
V
t
d
f
WI,p
WI
Q,WDact,th
Q,WDdeact,th
Q,WDact,hy
Q
V
WADJ,th
WADJ,int
WDact,th
WDdeact,th
WDact,hy
WI,lo
WI,hi
/
WI
I
/d
WADJ
t
Min.
0.65
0.55
50
–
–
96
127
104
7
–
2.6
0.5
1
–
23
Limit Values
Typ.
1.1
0.9
200
693
208
131
144
118
26
–
–
–
–
–
Figure 8
Max.
1.5
–
–
–
–
175
162
–
–
0.8
–
–
–
1
(unless otherwise specified).
Unit
mA
mA
mV
–
k
mA
mA
mA
V
V
V/ s
MHz
A
s
k
k
k
Conditions
I
I
–
–
V
–
Calculated value
Calculated value
Calculated value
–
–
V
V
Square Wave,
50% Duty Cycle
Q
Q
WADJ
WI
WI,low
2)
2)
increasing
decreasing
Rev. 1.0, 2008-07-31
Watchdog Function
V
= 0V
WI,high
V
WI
2)
TLE4678
V
WI,high
2)
1)
1)
1)
2)