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SC417/SC427
6
Electrical Characteristics (continued)
Parameter
Conditions
Min
Typ
Max
Units
Fault Protection
Valley Current Limit
R
ILIM
= 5.9k Ω
6
8
10
A
I
LIM
Source Current
10
μA
I
LIM
Comparator Offset
With respect to AGND
-10
0
+10
mV
Output Under-Voltage Fault
V
FB
with respect to internal 500mV reference,
8 consecutive clocks
-25
%
Smart Power-save Protection Threshold (2)
V
FB
with respect to internal 500mV reference
+10
%
Over-Voltage Protection Threshold
V
FB
with respect to internal 500mV reference
+20
%
Over-Voltage Fault Delay(2)
5μs
Over-Temperature Shutdown(2)
10°C hysteresis
150
°C
Logic Inputs/Outputs
Logic Input High Voltage
ENL
2.0
V
Logic Input Low Voltage
ENL
0.4
V
EN/PSV Input for PSAVE Operation (2)
V5V = 5V
2.2
5
V
EN/PSV Input for Forced Continuous Operation (2)
12
V
EN/PSV Input for Disabling Switcher (2)
0
0.8
V
EN/PSV Input Bias Current
EN/PSV= V5V or AGND
-10
+10
μA
ENL Input Bias Current
V
IN
= 28V
11
18
μA
FBL, FB Input Bias Current
FBL, FB = V5V or AGND
-1
+1
μA
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