Datasheet

TLE7368
General Product Characteristics
Data Sheet 23 Rev. 2.1, 2010-11-22
Window Watchdog
4.4.136 H-input voltage
threshold
V
WDI, high
––2.0V–
4.4.137 L-input voltage
threshold
V
WDI, low
0.8 – – V –
4.4.138 WDI pull-up resistor
R
WDI
60 100 140 kΩ connected to Q_LDO2
4.4.139 Watchdog cycle time
T
WD
–2–T
cycle
–
4.4.140 Window duration (OW,
CW, FW)
t
WD, W
– 512 – T
WD
–
4.4.141 Window duration (IW)
t
WD, IW
–32–T
WD
–
4.4.142 Window watchdog
initialization time
t
WD, start
–32–T
WD
Watchdog will start/initialized if
WDI is kept low for this period
and RO_2 is released
4.4.143 Watchdog output low
voltage
V
WDO,low
––0.4VI
WDO
= 2 mA
4.4.144 Watchdog output
leakage current
I
WDO,leak
––1µA WDO state = High
Thermal Shutdown
4.4.145 Overtemperature
shutdown
T
j, shtdwn
160 175 190 °C
1) 8)
4.4.146 Overtemperature
shutdown hysteresis
∆T 15 – 30 K
1)
1) Specified by design, not subject to production test.
2) Tested according to measurement circuit 1.
3)
V
CCP
supplied externally with a voltage according to the actual value of V
CCP
measurement.
4)
V
dr, Q_LDO1
= V
FB/L_IN
- V
Q_LDO1
; V
dr, Q_LDO2
= V
IN_LDO2
- V
Q_LDO2
; V
dr, T<1, 2>
= V
FB/L_IN
- V
Q_T<1, 2>
5) Minimum value given is needed for regulator stability; application might need higher capacitance than the minimum.
6) Measured when
V
Q_LDO2
has dropped 100 mV from its nominal value obtained at V
IN_LDO2
= 5.4 V.
7) External power transistor type: Fairchild KSH200.
8) Permanent operation of the device above 150 °C degrades lifetime; please refer to quality information.
Electrical Characteristics (cont’d)
V
IN
= V
IN_STBY
= 13.5 V, T
j
= -40 °C to +150 °C,
V
CCP
= 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground.
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.