tle4678 Infineon Technologies Corporation, tle4678 Datasheet - Page 19

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

Electrical Characteristics: Reset Function (cont’d)
V
all voltages with respect to ground, direction of currents as shown in
Pos.
7.2.15
7.2.16
7.2.17
7.2.18
1) Related Parameters (
2) For programming a different delay and reset reaction time, see
7.3
Undervoltage Reset Switching Thresholds
V
Datasheet
I
RT,lo
= 13.5 V,
V
V
,
Q
RT
V
5.0
4,9
4,8
4,7
[V],
[V]
RT,hi
-40
Parameter
Power-on Reset Delay Time
Internal Reset Reaction Time
Delay Capacitor
Discharge Time
Total Reset Reaction Time
T
Typical Performance Characteristics Reset Function
versus
-20
j
V
V
= -40 C to +150 C,
V
RT,hi
RT,lo
Q
0
T
20 40
j
V
RT,hi
,
V
RT,hy
Output Undervoltage
Reset Headroom
60
Pin RADJ = GND
) are scaled linear when the Reset Switching Threshold is modified.
80 100
Symbol
t
ON,100nF
t
t
t
rr,total,100nF
d,PWR-
rr,int
rr,d,100nF
120
T
V
j
VRT-Tj .v s d
140
[°C]
RH
Min.
30
–
–
–
19
Reset Delay Time
Delay Capacitor
Limit Values
Chapter
t
Typ.
43
9
1.5
10.5
d ,PWR- ON
[ms]
t
d
100
,
10
1
10
Figure 6
7.1.
Max.
56
15
3
18
C
t
D
d
(unless otherwise specified).
,
Unit
ms
t
s
s
s
d,PWR-ON
t
d,PWR-ON
t
d
100
(typ.)
Conditions
Calculated value;
C
C
C
C
Calculated Value:
t
C
rr,d,100nF
D
D
D
D
D
versus
(typ.)
= 100 nF
discharged to 0 V;
= 0 nF
= 100 nF
= 100 nF
Rev. 1.0, 2008-07-31
+
Reset Function
C
t
rr,int
D
2)
2)
2)
[nF]
TLE4678
;
;
td -CD .v s d
1000