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SC189ASKTRT Datasheet(PDF) 8 Page - Semtech Corporation

Part # SC189ASKTRT
Description  2.5MHz, 1.5A Synchronous Step Down Regulator
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC189ASKTRT Datasheet(HTML) 8 Page - Semtech Corporation

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© 2009 Semtech Corp.
8
SC189
Typical Characteristics (continued)
UVLO Rising Threshold Variation
UVLO Rising Threshold Variation
-1.0%
-0.8%
-0.6%
-0.4%
-0.2%
0.0%
0.2%
0.4%
0.6%
0.8%
1.0%
-40
-15
10
35
60
85
Ambient Temperature (°C)
IOUT= 0A
UVLO Hysteresis Variation
-5%
-4%
-3%
-2%
-1%
0%
1%
2%
3%
4%
5%
-40
-15
10
35
60
85
Ambient Temperature (°C)
IOUT= 0A
UVLO Hysteresis Variation
Dropout Voltage in 100% Duty Cycle Operation
Dropout Voltage of 100% Duty Cycle Operation (MLP)
0
50
100
150
200
250
300
350
400
450
500
0.0
0.3
0.6
0.9
1.2
1.5
Output Current (A)
Package: MLPD-UT6
TA= 25°C
L= MDT2520-CR1R0M
(DCR= 80m
_max)
L= 1071AS-1R0
(DCR=40m
_max)
Load Regulation (V
OUT=1.5V)
Load Regulation
-1.0%
-0.8%
-0.6%
-0.4%
-0.2%
0.0%
0.2%
0.4%
0.6%
0.8%
1.0%
0.0
0.3
0.6
0.9
1.2
1.5
Output Current (A)
VIN= 5.0V
VIN= 3.3V
VOUT= 1.50V
TA=25°C
Load Regulation
-1.0%
-0.8%
-0.6%
-0.4%
-0.2%
0.0%
0.2%
0.4%
0.6%
0.8%
1.0%
0.0
0.3
0.6
0.9
1.2
1.5
Output Current (A)
VIN= 5.0V
VIN= 4.0V
VOUT= 3.30V
TA=25°C
Load Regulation (V
OUT=3.3V)
Circuit Conditions: C
IN= 10uF/6.3V; COUT= 10uF/6.3V for L=2.2uH; COUT= 22uF/6.3V for L=1uH.
Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package.
Dropout Voltage in 100% Duty Cycle Operation
Dropout Voltage of 100% Duty Cycle Operation (SOT23-5)
0
50
100
150
200
250
300
350
400
450
500
0.0
0.3
0.6
0.9
1.2
1.5
Output Current (A)
Package: SOT23-5
TA= 25°C
L= MDT2520-CR1R0M
(DCR= 80m
_max)
L= 1071AS-2R2
(DCR=60m
_max)


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