NCV8668 データシートの表示（PDF） - ON Semiconductor
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NCV8668 Datasheet PDF : 21 Pages
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NCV8668
ELECTRICAL CHARACTERISTICS
Vin = 13.2 V, Cin = 0.1 mF, Cout = 2.2 mF, for typical values TJ = 25°C, for min/max values TJ = −40°C to 150°C; unless otherwise noted.
(Notes 10 and 11)
Parameter
Test Conditions
Symbol Min Typ Max Unit
Window Watchdog
Window Watchdog Trigger Time
(Note 14)
Fast:
Slow:
WM2 = L
WM1 = L AND WM2 = H
tWD
−
48
−
ms
−
96
−
Watchdog Deactivation Current
Threshold
3.3 V
5.0 V
Watchdog Activating Current Threshold
3.3 V
5.0 V
Reset Output RO
Iout decreasing
Vin > 4.5 V
Vin > 5.5 V
Iout increasing
Vin > 4.5 V
Vin > 5.5 V
Iout_WD_OFF
0.5
−
0.5
−
Iout_WD_ON
−
2
−
2
mA
−
−
mA
5
5
Input Voltage Reset Threshold
3.3 V
Vin decreasing, Vout > VRT
Vin_RT
V
−
3.8 4.2
Output Voltage Reset Threshold
3.3 V
5.0 V
Reset Hysteresis
Maximum Reset Sink Current
3.3 V
5.0 V
Reset Output Low Voltage
Reset Output High Voltage
5.0 V
Vout decreasing
Vin > 4.5 V
Vin > 5.5 V
Vout = 3 V, VRO = 0.25 V
Vout = 4.5 V, VRO = 0.25 V
Vout > 1 V, IRO < 200 mA
VRT
VRH
IRomax
VROL
VROH
90
90
−
1.3
1.75
−
4.5
93
93
2.0
−
−
0.15
−
96
96
−
−
−
0.25
−
%Vout
%Vout
mA
V
V
Reset High Level Leakage Current
3.3 V
IROLK
−
−
1
mA
Integrated Reset Pull Up Resistor
5.0 V
RRO
15
30
50
kW
Reset Delay Time
Fast: WM1 = L AND WM2 = L
tRD
Slow:WM1 = H OR (WM1 = L AND WM2 = H)
12.8 16 19.2 ms
25.6 32 38.4
Reset Reaction Time (See Figure 24)
THERMAL SHUTDOWN
tRR
16
25
38
ms
Thermal Shutdown Temperature
(Note 13)
TSD
150 175 195 °C
Thermal Shutdown Hysteresis (Note 13)
TSH
−
25
−
°C
10. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area.
11. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TA [TJ. Low duty
cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
12. Measured when output voltage falls 100 mV below the regulated voltage at Vin = 13.2 V. If Vout < 5 V, then VDO = Vin – Vout. Maximum dro-
pout voltage value is limited by minimum input voltage Vin = 4.5 V recommended for guaranteed operation at maximum output current.
13. Values based on design and/or characterization.
14. Recommended for typical trigger time. TWD = tCW + 1/2 * tOW
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