SC189ASKTRT Semtech, SC189ASKTRT Datasheet - Page 5

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

Typical Characteristics
Circuit Conditions: C
Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package.
© 2009 Semtech Corp.
100%
100%
Efficiency vs. Load Current (V
95%
90%
85%
80%
75%
70%
65%
60%
95%
90%
85%
80%
75%
70%
65%
60%
800
600
400
200
0
0.0
0.0
0.0
Total Loss vs. Load Current (V
Efficiency vs. Load Current (V
V
T
A
OUT
=25° C
L=1071AS-2R2N (50m_typ)
= 1.50V
V
T
A
OUT
=25° C
V
V
T
IN
A
0.3
0.3
IN
OUT
0.3
= 1.50V
= 10uF/6.3V; C
=25° C
= 5.0V
= 1.0V
L=1071AS-1R0N (33m_typ)
L=LQM2HPN1R0MG0 (55m_typ)
L=MDT2520-CR1R0M (60m_typ)
Output Current (A)
Output Current (A)
Output Current (A)
0.6
Efficiency
0.6
Efficiency
0.6
Losses
OUT
V
= 10uF/6.3V for L=2.2uH; C
IN
V
= 3.3V
IN
IN
V
= 5.0V
0.9
=5.0V, V
0.9
IN
0.9
= 3.3V
OUT
OUT
V
IN
=1.5V)
=1.5V)
= 5.0V
OUT
1.2
1.2
1.2
=1.0V)
OUT
1.5
1.5
1.5
= 22uF/6.3V for L=1uH.
5
100%
100%
Efficiency vs. Load Current (V
95%
90%
85%
80%
75%
70%
65%
60%
95%
90%
85%
80%
75%
70%
65%
60%
800
600
400
200
0
0.0
0.0
0.0
Total Loss vs. Load Current (V
Efficiency vs. Load Current (V
V
T
OUT
A
V
=25° C
IN
= 3.30V
= 4.0V
L=1071AS-1R0N (33m_typ)
V
V
T
V
T
A
IN
OUT
L=MDT2520-CR1R0M (60m_typ)
A
OUT
=25° C
= 5.0V
=25° C
0.3
0.3
0.3
= 3.3V
L=1071AS-2R2N (50m_typ)
V
= 3.30V
IN
= 5.0V
Output Current (A)
L=LQM2HP1R0MG0 (55m_typ)
Output Current (A)
Output Current (A)
Efficiency
0.6
Efficiency
0.6
0.6
V
Losses
IN
= 5.0V
IN
V
0.9
=5.0V, V
0.9
0.9
IN
= 4.0V
OUT
OUT
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=3.3V)
=3.3V)
OUT
1.2
1.2
1.2
SC189
=3.3V)
1.5
1.5
1.5