TLE4268 Datasheet, PDF (7/13 Pages) Siemens Semiconductor Group – 5-V Low-Drop Fixed Voltage Regulator

TLE 4268
Characteristics (cont’d)
V_I = 13.5 V; – 40 °C ≤ T_j ≤ 125 °C (unless otherwise specified)
Parameter
Symbol
Limit Values
Unit
min. typ. max.
Test Condition
Reset Generator
Switching threshold V_RT
Switching voltage V_RE
Saturation voltage V_R
Saturation voltage V_C
Charging current
I_d
Delay switching
V_DU
threshold
Delay time
t_d
Delay time
t_t
Pull-up
R_R
Lower switching
V_DRL
threshold
4.2 4.5 4.8 V
–
1.28 1.35 1.45 V
–
–
0.2 0.5 V
1 mA extern
–
30
100 mV V_Q < V_RT
5
12
18
µA V_C = 1.0 V
1.4 1.8 2.2 V
–
10
15
25
ms C_d = 100 nF
–
2
–
µs C_d = 100 nF
18
30
46
kΩ with resp. to V_Q
0.2 0.4 0.55 V
–
Watchdog
Discharge current I_Cd
1.5 3.5 5.2 µA V_C = 1.0 V
Charging current
I_d
5
12
18
µA V_C = 1.0 V
Switching voltage V_Cd
1.6 1.8 2.0 V
–
Lower switching
threshold
V_DWL
0.2 0.4 0.55 V
–
Watchdog periode T_WP
Watchdog trigger
T_WT
time
30
55
75
ms C_d = 100 nF
25
40
60
ms C_d = 100 nF
Activating current I_Q
2
8
15
mA Activates watchdog
Slew rate
V_W
5
–
–
V/µs from 20 % up to
80 % V_Q
Note: The reset output is low in range from V_Q = 1 V to V_RT.
Semiconductor Group
7
1998-11-01