SC414/SC424
6
Electrical Characteristics (continued)
Parameter
Conditions
Min  Typ  Max  Units
Power Good
Power Good Threshold
Upper limit, V
FB
> internal 750mV reference
+20
%
Lower limit, V
FB
< internal 750mV reference
-10
%
Start-Up Delay Time (Time between EN going
high and PGOOD going high)
V5V = 3V
2
ms
V5V = 5V
4
Fault (noise immunity) Delay Time
(2)
5
約
Leakage
1    糀
Power Good On-Resistance
10
?/DIV>
Fault Protection
Valley Current Limit
V5V = 5V, R
ILIM
= 5k ?/DIV>
3
4
5    A
Valley Current Limit
V5V = 3V, R
ILIM
= 5k ?/DIV>
3.4
A
I
LIM
Source Current
8
糀
I
LIM
Comparator Off set
With respect to AGND
-8    0    +8   mV
Output Under-Voltage Fault
V
FB
with respect to internal 750mV reference,
8 consecutive clock cycles
-25
%
Smart Power-save Protection Threshold
(2)
V
FB
with respect to internal 750mV reference
+10
%
Over-Voltage Protection Threshold
V
FB
with respect to internal 750mV reference
+20
%
Over-Voltage Fault Delay
(2)
5
約
Over-Temperature Shutdown
(2)
10癈 hysteresis
150
癈
Logic Inputs/Outputs
Logic Input High Voltage
ENL
1
V
Logic Input Low Voltage
ENL
0.4    V
EN/PSV Input for PSAVE Operation
(2)
% of V5V
45
100    %
EN/PSV Input for Forced Continuous Operation
(2)
% of V5V
1V
42    %
EN/PSV Input for Disabling Switcher
(2)
0
0.4    V
EN/PSV Input Bias Current
EN/PSV= V5V or AGND
-10
+10   糀
ENL Input Bias Current
V
IN
= 28V
11    18    糀
FB Input Bias Current
FB = V5V or AGND
-1
+1    糀
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