tle4678 Infineon Technologies Corporation, tle4678 Datasheet - Page 24

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

Electrical Characteristics Watchdog Function
V
all voltages with respect to ground, direction of currents as shown in
Pos.
Watchdog Output WO
8.2.15
8.2.16
8.2.17
Watchdog Timing
8.2.18
8.2.19
8.2.20
8.2.21
8.2.22
8.2.23
8.2.24
1) See
2) For details on the test pulse applied, see
3) For programming a different watchdog timing, see
Datasheet
I
= 13.5 V,
Chapter 8.1
Parameter
Watchdog Output
Low Voltage
Watchdog Output
Maximum Sink Current
Watchdog Output
Internal Pull-up Resistor
Delay Capacitor
Charge Current
Delay capacitor
watchdog discharge current
Upper watchdog timing
threshold
Lower watchdog timing
threshold
Watchdog Trigger Time
Watchdog Output Low Time
Watchdog Period
T
j
= -40 C to +150 C,
for calculation hint
Figure
Symbol
V
I
R
I
I
V
V
t
t
t
WI,tr,100nF
WD,lo,100nF
WD,p,100nF
WO,max
D
DW,disch
WO,low
WO
DW,hi
DW,lo
10.
Chapter
Min.
–
1.5
20
–
–
–
–
25
13
38
24
8.1..
Limit Values
Typ.
0.2
13
30
2.78
1.39
1.2
0.7
36
18
54
Figure 8
Max.
0.4
30
40
–
–
–
–
47
23
70
(unless otherwise specified).
Unit
V
mA
k
V
V
ms
ms
ms
A
A
Conditions
I
Watchdog active;
V
V
Watchdog active;
V
–
V
V
–
–
Calculated value;
C
Calculated value;
C
V
Calculated value;
t
C
WI,tr,100nF
WO
WI
WO
WI
D
D
Q
D
D
D
Rev. 1.0, 2008-07-31
Watchdog Function
= 1 V
= 1 V
>
= 100 nF
= 100 nF
= 100 nF
= 1 mA;
= 0 V
= 0 V
= 0.8 V;
V
RT,lo
+
t
WD,lo,100nF
3)
3)
3)
TLE4678