SC417/SC427
6
Electrical Characteristics (continued)
Parameter
Conditions
Min Typ Max Units
Linear Regulator (LDO)
FBL Accuracy
VLDO load = 10mA
0.735 0.75 0.765 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
(3)
-140
+140 mV
VLDO to VOUT Non-switch-over Threshold
(3)
-450
+450 mV
VLDO to VOUT Switch-over Resistance
V
OUT
= +5V
2
&
LDO Drop Out Voltage
(4)
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) 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.
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