SC189CSKTRT Semtech, SC189CSKTRT Datasheet - Page 6

• Manufacturer Part Number: SC189CSKTRT
• Description: IC BUCK 1.2V 1.5A SOT23-5
• Manufacturer: Semtech
• Type: Step-Down (Buck)r

Specifications of SC189CSKTRT

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.2V
• Current - Output: 1.5A
• Frequency - Switching: 2.5MHz
• Voltage - Input: 2.9 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: SC189CSKTR

© 2009 Semtech Corp.
Typical Characteristics (continued)
Circuit Conditions: C
Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package.
100%
100%
Efficiency vs. Load Current (V
Total Loss 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
Efficiency vs. Load Current (SOT23-5)
V
T
V
V
T
A
OUT
A
IN
OUT
=25° C
=25° C
= 5.0V
= 1.50V
V
T
= 1.0V
A
L=LQM2HPN1R0MG0 (55m_typ)
OUT
=25° C
IN
0.3
0.3
0.3
= 1.50V
= 10uF/6.3V; C
L=1071AS-2R2 (50m_typ)
L=MDT2520-CR1R0 (60m_typ)
Output Current (A)
Output Current (A)
Output Current (A)
0.6
0.6
0.6
Efficiency
Efficiency
L=1071AS-1R0 (33m_typ)
Losses
OUT
V
= 10uF/6.3V for L=2.2uH; C
IN
V
= 3.3V
IN
OUT
OUT
V
= 5.0V
0.9
0.9
IN
0.9
= 3.3V
=1.5V, SOT23-5)
=1.5V, SOT23-5)
V
IN
= 5.0V
1.2
1.2
1.2
OUT
1.5
1.5
1.5
= 22uF/6.3V for L=1uH.
6
100%
100%
Total Loss vs. Load Current (V
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
Efficiency vs. Load Current (SOT23-5)
V
T
OUT
A
V
=25° C
IN
= 3.30V
= 4.0V
V
V
T
V
T
A
L=MDT2520-CR1R0M (60m_typ)
IN
OUT
A
=25° C
OUT
= 5.0V
=25° C
0.3
0.3
0.3
L=1071AS-1R0N (33m_typ)
= 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)
0.6
0.6
0.6
Efficiency
Efficiency
V
Losses
IN
= 5.0V
OUT
OUT
V
0.9
0.9
0.9
IN
=3.3V, SOT23-5)
=3.3V, SOT23-5)
= 4.0V
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1.2
1.2
1.2
SC189
1.5
1.5
1.5