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