SC189ASKTRT Semtech, SC189ASKTRT Datasheet - Page 8

• Manufacturer Part Number: SC189ASKTRT
• Description: 2.5MHz, 1.5A Synchronous Step Down Regulator In SOT-23_5
• Manufacturer: Semtech

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