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SC414/SC424
7
Electrical Characteristics (continued)
Parameter
Conditions
Min  Typ  Max  Units
Linear Regulator  LDO (not available for V5V < 5V)
VLDO Accuracy
VLDO load = 10mA
4.9    5.0    5.1    V
LDO Current Limit
Start-up and foldback, V
IN
 = 12V
85
mA
Operating current limit, V
IN
 = 12V
135   200
VLDO to VOUT Switch-over Threshold
(4)
-140
+140   mV
VLDO to VOUT Non-switch-over Threshold
(4)
-450
+450   mV
VLDO to VOUT Switch-over Resistance
V
OUT
 = +5V
2
?/DIV>
LDO Drop Out Voltage
(5)
From V
IN
 to V
VLDO
, V
VLDO
 = +5V, I
VLDO
 = 100mA
1.2
V
Notes:
(1) V
IN
 UVLO is programmable using a resistor divider from VIN to ENL to AGND. The ENL voltage is compared to an internal reference.
(2) Guaranteed by design.
(3) For V5V less than 4.5V, the On-Time may be limited by the V5V supply voltage and by V
IN
. See the TON Limitations and V5V Supply Voltage
section in the applications Information.
(4) The switch-over threshold is the maximum voltage diff erential between the VLDO and VOUT pins which ensures that VLDO will internally
switch-over to V
OUT
. The non-switch-over threshold is the minimum voltage diff erential between the VLDO and VOUT pins which ensures that
VLDO will not switch-over to V
OUT
.
(5) The LDO drop out voltage is the voltage at which the LDO output drops 2% below the nominal regulation point. Thermal resistance, junction
to ambient  guaranteed by design (癈/W)
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