TLE4678-2_15 Datasheet, PDF (26/33 Pages) Infineon Technologies AG – Low Drop Out Linear Voltage Regulator

TLE4678-2
Watchdog Function
Table 8 Electrical Characteristics: Watchdog Function (cont’d)
V_I = 13.5 V, T_j = -40°C to +150 °C,
all voltages with respect to ground, direction of currents as shown in Table 8 (unless otherwise specified).
Parameter
Symbol
Values
Unit Note / Test Condition Number
Min. Typ. Max.
Upper watchdog timing
threshold
V_DW,hi
–
1.2 –
V
–
P_8.2.17
Lower watchdog timing
threshold
V_DW,lo
–
0.7 –
V
–
P_8.2.18
Watchdog Trigger Time
t_WI,tr,100nF 24
36
54
Watchdog Output Low Time
t_WD,lo,100nF 12
18
27
Watchdog Period
t_WD,p,100nF 36
54
81
1) For details see Table 7.
2) Not subject to production test, specified by design.
3) For details on the test pulse applied, see Figure 9.
4) For programming a different watchdog timing, see Chapter 8.1..
ms Calculated value;
P_8.2.19
C_D = 100 nF ⁴⁾
ms Calculated value;
P_8.2.20
C_D = 100 nF ⁴⁾
V_Q > V_RT,lo
ms Calculated value;
P_8.2.21
t t _WI,tr,100nF + _WD,lo,100nF
C_D = 100 nF ⁴⁾
Data Sheet
26
Rev. 1.0, 2014-03-03