TLE4278G Datasheet, PDF (8/18 Pages) Siemens Semiconductor Group – 5-V Low-Drop Fixed Voltage Regulator

TLE 4278 G
Electrical Characteristics (cont’d)
V_I = 13.5 V; – 40 °C ≤ T_j ≤ 125 °C (unless otherwise specified)
Parameter
Symbol Limit Values Unit Test Condition
min. typ. max.
Upper timing threshold V_DU
Lower reset timing
V_DRL
threshold
1.5 1.9 2.3 V –
0.2 0.3 0.4 V –
Delay time
t_d
Reset reaction time
t_RR
12 20 28 ms C_D = 47 nF
0.4 1.0 2.0 µs C_D = 47 nF
Watchdog
Activating threshold
Current ratio
Slew rate
Watchdog low voltage
Watchdog high voltage
Watchdog pull-up
Charge current
Discharge current
Upper timing threshold
Lower watchdog timing
threshold
V_WADJ
I_Q/I_WADJ
V_WI
V_WOL
V_WOH
R_WO
I_d
I_dis
V_DU
V_DWL
1.28 1.35
650 720
5–
– 0.2
4.5 –
20 30
25
0.6 1.3
1.5 1.9
0.5 0.7
1.45
800
–
0.4
–
45
8
2.0
2.3
0.9
V Voltage at WADJ
– I_Q ≤ 10 mA
V/µs From 20% up to 80% V_Q
V R_ext = 10 kΩ to V_Q
V–
kΩ Internal connected to V_Q
µA V_D = 1.0 V
µA V_D = 1.0 V
V–
V–
Watchdog output period T_WP
Watchdog output low t_WR
time
42 60 80 ms C_d = 47 nF
7
13 19 ms V_Q > V_RT
Watchdog trigger time T_WT
35 47 61 ms C_d = 47 nF
1) _{Measured when the output voltage VQ has dropped 100 mV from the nominal value.}
Semiconductor Group
8
1998-11-01