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SC402B
6
Electrical Characteristics (continued)
Parameter
Conditions
Min  Typ  Max  Units
Linear Regulator (LDO)
FBL Accuracy
VLDO load = 5mA
0.728   0.75   0.773   V
LDO Current Limit
Short-circuit protection, V
IN
 = 12V, V
DD
 < 0.75V
65
mA
Start-up and foldback, V
IN
 = 12V,
0.75 < V
DD
 < 90% of final V
DD
 value
115
Operating current limit, V
IN
 = 12V,
V
DD
 > 90% of final V
DD
 value
135   200
VLDO to VOUT Switch-over Threshold
(4)
-130
+130   mV
VLDO to VOUT Non-switch-over Threshold
(4)
-500
+500   mV
VLDO to VOUT Switch-over Resistance
V
OUT
 = +5V
2
&
LDO Drop Out Voltage
(5)
From V
IN
 to V
DD
, V
DD
 = +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) Typical value measured on standard evaluation board.
(3) SC402B has first order temperature compensation for over current. Results vary based upon the PCB thermal layout.
(4) The switch-over threshold is the maximum voltage differential between the VDD 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.
(5) The LDO drop out voltage is the voltage at which the LDO output drops 2% below the nominal regulation point.
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