SC1480
POWER MANAGEMENT
Electrical Characteristics Cont.
Test Conditions: V
IN
= 2.5V, REFIN = 1.25, VCCA = VDDP = 5.0V, V
OUT
= 1.25V, R
TON
= 1M (300kHz), 0.1% Resistor Dividers
Parameter
Conditions
Min
25°C
Typ
1660
913
400
Max
-40°C to 125°C
Min
1411
776
Max
1909
1050
550
Units
On-Time
R
TON
= 1M (300kHz)
VIN = 2.5V
R
TON
= 500K (600kHz)
VIN = 2.5V
ns
ns
ns
%/V
%
kΩ
Minimum Off Time
Line Regulation Error
Load Regulation Error
FBK Input Resistance
Over-Current Sensing
ILIM Sink Current
Current Comparator Offset
Reference Buffer
REFOUT Source Current
REFIN Enable Threshold
REFIN Hysteresis
Offset Voltage
REFOUT current = 0mA
REFOUT current = 3mA
Fault Protection
Current Limit (Positive)
(2)
PGND-LX, R
ILIM
= 5k
PGND-LX, R
ILIM
= 10k
PGND-LX, R
ILIM
= 20k
Current Limit (Negative)
Output Under-Voltage Fault
Output Over-Voltage Fault
Over-Voltage Fault Delay
PGOOD Low Output Voltage
PGOOD Leakage Current
PGOOD UV Threshold
PGND-LX
With respect to REFOUT
With respect to REFOUT
FBK forced above OV Vth
Sink 1mA
FBK in regulation, PGOOD = 5V
With respect to REFOUT
PGND - ILIM
VCCA, VDDP = 4.5V to 5.5V
Vin = 4.5V to 25V
ILIM - PGND = 0V to 0
°
C Limit
0.04
0.3
500
10
9
-5
11
5
µA
mV
3
0.8
40
-10
-12.5
10
12.5
0.55
1.0
mA
V
mV
mV
mV
50
100
200
-140
-20
+10
2.0
40
90
180
-200
-28
+8
60
110
220
-100
-15
+12
mV
mV
mV
mV
%
%
µs
0.4
1
-10
-12
-8
V
µA
%
2006 Semtech Corp.
3
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SEMTECH [ SEMTECH CORPORATION ]
