SC189ASKTRT Semtech, SC189ASKTRT Datasheet - Page 7

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

Typical Characteristics (continued)
Circuit Conditions: C
Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package.
© 2009 Semtech Corp.
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
-10%
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
30%
25%
20%
15%
10%
-5%
-1%
-2%
-3%
-4%
-5%
5%
0%
5%
4%
3%
2%
1%
0%
2.5
2.5
2.5
Switching Frequency vs. Input Voltage
I
T
I
T
OUT
OUT
R
A
I
T
A
LX
= 25° C
= 25° C
DS(ON)
A
= ±100mA
= 25° C
= 0A
= 0A
Switching Frequency Variation over Line
3.0
3.0
3.0
IN
RDSON (P & N) Variation over Line
= 10uF/6.3V; C
Variation vs. Input Voltage
Line Regulation
Line Regulation ove Line
3.5
3.5
3.5
V
Input Voltage (V)
OUT
Input Voltage (V)
Input Voltage (V)
N-Channel
= 1.5V
OUT
P-Channel
4.0
4.0
4.0
= 10uF/6.3V for L=2.2uH; C
V
V
OUT
OUT
V
= 1.5V
= 3.3V
OUT
4.5
4.5
4.5
= 3.3V
5.0
5.0
5.0
OUT
5.5
5.5
5.5
= 22uF/6.3V for L=1uH.
7
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
-10%
-15%
-20%
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
20%
15%
10%
-5%
5%
0%
-40
-40
-40
Switching Frequency vs. Temperature
V
I
V
I
OUT
OUT
V
I
Line Regulation vs. Temperature
LX
R
IN
OUT
IN
N-Channel
= 5.0V
= ±100mA
DS(ON)
RDSON (P & N) Variation Over Temperature
= 5.0V
= 0A
= 0A
= 1.5V
-15
-15
-15
Line Regulation over Temperature
Variation vs. Temperature
Switching Frequency Variation
Ambient Temperature (° C)
Ambient Temperature (° C)
Ambient Temperature (° C)
10
10
10
P-Channel
35
35
35
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60
60
60
SC189
85
85
85