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SC403
5
Electrical Characteristics (continued)
Parameter
Conditions
Min  Typ  Max  Units
Current Sense
Zero-Crossing Detector Threshold
LX - PGND
-3    0    +3    mV
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 (between PWM enable and
PGOOD going high)
V
DD
 = 3V, C
SS
 = 10nF
7
ms
V
DD
 = 5V, C
SS
 = 10nF
12
Soft Start Threshold
When PGOOD logic switches high
64
%
Fault (noise immunity) Delay Time
5
祍
Leakage
1    礎
Power Good On-Resistance
10
&
Fault Protection
Valley Current Limit
V
DD
 = 5V,R
ILIM
 = 6k &
5.1
A
V
DD
 = 3V,R
ILIM
 = 6k &
4.3
Output Under-Voltage Fault
V
FB
 with respect to internal 750mV reference,
8 consecutive switching cycles
-25
%
Smart Power-save Protection Threshold
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
 
5
約
Over-Temperature Shutdown
10癈 hysteresis
155
癈
Logic Inputs/Outputs
Logic Input High Voltage
ENL, minimum level
1
V
Logic Input Low Voltage
ENL, maximum level
0.4
V
EN/PSV Input for PSAVE Operation
 
Maximum level expressed in % of V
DD
100
%
Minimum level expressed in % of V
DD
45
EN/PSV Input for Forced Continuous Operation
 
Maximum level expressed in % of V
DD
42
%
Minimum level
1
V
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