SC417 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
Manufacturer
SC417 Datasheet PDF : 29 Pages
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SC417/SC427
Electrical Characteristics (continued)
Parameter
Conditions
Min Typ Max Units
Fault Protection
Valley Current Limit
I Source Current
LIM
I Comparator Offset
LIM
Output Under-Voltage Fault
Smart Power-save Protection Threshold (2)
Over-Voltage Protection Threshold
Over-Voltage Fault Delay(2)
R = 5.9k Ω
ILIM
with respect to AGND
V with respect to internal 500mV reference,
FB
8 consecutive clocks
V with respect to internal 500mV reference
FB
V with respect to internal 500mV reference
FB
6
8
10
A
10
μA
-10
0
+10 mV
-25
%
+10
%
+20
%
5
μs
Over-Temperature Shutdown(2)
10°C hysteresis
150
°C
Logic Inputs/Outputs
Logic Input High Voltage
EN/PSV, ENL
2.0
V
Logic Input Low Voltage
EN/PSV, ENL
0.4
V
EN/PSV Input Bias Current
EN/PSV= V5V or AGND
-10
+10 μA
ENL Input Bias Current
FBL, FB Input Bias Current
V = 28V
IN
FBL, FB = V5V or AGND
11
18
μA
-1
+1
μA
Linear Regulator (LDO)
FBL Accuracy
VLDO load = 10mA
0.735 0.75 0.765 V
LDO Current Limit
VLDO to VOUT Switch-over Threshold (3)
Start-up and foldback, V = 12V
IN
operating current limit, V = 12V
IN
85
mA
135 200
-140
+140 mV
VLDO to VOUT Non-switch-over Threshold (3)
-450
+450 mV
VLDO to VOUT Switch-over Resistance
V = +5V
OUT
2
Ω
LDO Drop Out Voltage (4)
from V to V , V = +5V, I = 100mA
IN
VLDO VLDO
VLDO
1.2
V
Notes:
(1) V UVLO is programmable using a resistor divider from VIN to ENL to AGND. The ENL voltage is compared to an internal reference.
IN
(2) Guaranteed by design.
(3) The switch-over threshold is the maximum voltage differential between the VLDO and VOUT pins which ensures that VLDO will internally
switch-over to VOUT. The non-switch-over threshold is the minimum voltage differential between the VLDO and VOUT pins which ensures
that VLDO will not switch-over to VOUT.
(4) The LDO drop out voltage is the voltage at which the LDO output drops 2% below the nominal regulation point.
6
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