SC1480EVB View Datasheet(PDF) - Semtech Corporation
Part Name
Description
Manufacturer
SC1480EVB Datasheet PDF : 22 Pages
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SC1480
POWER MANAGEMENT
Electrical Characteristics Cont.
Test Conditions: VIN = 2.5V, REFIN = 1.25, VCCA = VDDP = 5.0V, VOUT = 1.25V, RTON = 1M (300kHz), 0.1% Resistor Dividers
Parameter
Conditions
25°C
-40°C to 125°C
Units
Min Typ Max Min Max
On-Time
RTON = 1M (300kHz)
VIN = 2.5V
1660
1411 1909
ns
RTON = 500K (600kHz)
VIN = 2.5V
913
776 1050
ns
Minimum Off Time
400
550
ns
Line Regulation Error
VCCA, VDDP = 4.5V to 5.5V
0.04
%/V
Vin = 4.5V to 25V
Load Regulation Error
ILIM - PGND = 0V to 0°C Limit
0.3
%
FBK Input Resistance
500
kΩ
Over-Current Sensing
ILIM Sink Current
10
9
11
µA
Current Comparator Offset
PGND - ILIM
-5
5
mV
Reference Buffer
REFOUT Source Current
3
mA
REFIN Enable Threshold
0.8
0.55
1.0
V
REFIN Hysteresis
40
mV
Offset Voltage
REFOUT current = 0mA
-10
10
mV
REFOUT current = 3mA
-12.5 12.5 mV
Fault Protection
Current Limit (Positive) (2)
Current Limit (Negative)
PGND-LX, RILIM = 5k
PGND-LX, RILIM = 10k
PGND-LX, RILIM = 20k
PGND-LX
50
100
200
-140
40
60
mV
90
110
mV
180 220
mV
-200 -100
mV
Output Under-Voltage Fault
With respect to REFOUT
-20
-28
-15
%
Output Over-Voltage Fault
With respect to REFOUT
+10
+8
+12
%
Over-Voltage Fault Delay
FBK forced above OV Vth
2.0
µs
PGOOD Low Output Voltage Sink 1mA
0.4
V
PGOOD Leakage Current
FBK in regulation, PGOOD = 5V
1
µA
PGOOD UV Threshold
With respect to REFOUT
-10
-12
-8
%
2006 Semtech Corp.
3
www.semtech.com
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