NCV8508B
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (−40°C ≤ T
J
≤ 125°C; 6.0 V ≤ V
IN
≤ 28 V, 100 mA ≤ I
OUT
≤ 150 mA, C
2
= 1.0 mF, R
Delay
= 60 k;
unless otherwise specified.)
Characteristic
Test Conditions Min Typ Max Unit
OUTPUT
Output Voltage 5.0 V
− 4.85 5.00 5.15 V
Output Voltage 3.3 V − 3.201 3.3 3.399 V
Dropout Voltage (V
IN
− V
OUT
) 5.0 V I
OUT
= 150 mA. Note 3 − 450 900 mV
Load Regulation
V
IN
= 14 V, 100 mA ≤ I
OUT
≤ 150 mA
− 5.0 30 mV
Line Regulation 6.0 V ≤ V
IN
≤ 28 V, I
OUT
= 5.0 mA − 5.0 50 mV
Current Limit − 250 400 − mA
Thermal Shutdown Guaranteed by Design 150 180 210 °C
Quiescent Current V
IN
= 12 V, I
OUT
= 150 mA, (see Figure 6) − 100 150
mA
RESET
Threshold 5.0 V − 4.50 4.65 4.80 V
Threshold 3.3 V − 2.970 3.069 3.168 V
Output Low R
LOAD
= 10 k to V
OUT
, V
OUT
≥ 1.0 V
R
LOAD
= 5.1 k to V
OUT
, V
OUT
≥ 1.0 V
− 0.2
0.4
0.4
0.8
V
Output High R
LOAD
= 10 k to GND
R
LOAD
= 5.1 k to GND
V
OUT
− 0.5
V
OUT
− 1.0
V
OUT
− 0.25
V
OUT
− 0.5
− V
Delay Time NCV85081B V
IN
= 14 V, R
Delay
= 60 k, I
OUT
= 5.0 mA
V
IN
= 14 V, R
Delay
= 120 k, I
OUT
= 5.0 mA
2.0
−
3.0
6.0
4.0
−
ms
ms
Delay Time NCV85082B V
IN
= 14 V, R
Delay
= 60 k, I
OUT
= 5.0 mA
V
IN
= 14 V, R
Delay
= 120 k, I
OUT
= 5.0 mA
6.0
−
9.0
18
12.0
−
ms
ms
WATCHDOG INPUT
Threshold High
− 70 − − %V
OUT
Threshold Low − − − 30 %V
OUT
Hysteresis − − 100 − mV
Input Current WDI = 6.0 V − 0.1 +10
mA
Pulse Width 50% WDI falling edge to
50% WDI rising edge and
50% WDI rising edge to
50% WDI falling edge, (see Figure 5)
5.0 − −
ms
WAKEUP OUTPUT (V
IN
= 14 V, I
OUT
= 5.0 mA)
Wakeup Period NCV85081B
See Figures 4 and 5, R
DELAY
= 60 k
See Figures 4 and 5, R
DELAY
= 120 k
18
−
25
50
32
−
ms
ms
Wakeup Period NCV85082B R
DELAY
= 60 k
R
DELAY
= 120 k
54
−
75
150
96
−
ms
ms
Wakeup Duty Cycle Nominal See Figure 3 45 50 55 %
RESET HIGH to Wakeup Rising Delay
Time NCV85081B
R
DELAY
= 60 k, 50% RESET rising edge to
50% Wakeup edge
R
DELAY
= 120 k
(see Figures 3 and 4)
9.0
−
12.5
25
16
−
ms
ms
3. Measured when the output voltage has dropped 100 mV from the nominal value. (see Figure 12)
4. Current drain on the Delay pin directly affects the Delay Time, Wakeup Period, and the RESET
to Wakeup Delay Time.
