SC2434TSTR View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC2434TSTR Datasheet PDF : 19 Pages
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POWER MANAGEMENT
Applications Information (Cont.)
Typical Performance Of The Reference Design
The reference design implemented 1.5mOhm output droop impedance as shown in Fig. 9.
Load Line (Vin=12V, VID=00100)
SC2434
1.76
1.74
1.72
1.7
1.68
1.66
1.64
1.62
1.6
0
Vo
Spec_H
Spec_L
10 20 30 40 50 60
I (A)
Fig. 9 - Measured output drooping characteristics of the 60A design.
The efficiency of the design is depends on the MOSFET being used and thermal management requirements of
controlling the PCB temperature and the MOSFET junction temperature. The following efficiency curve is corresponding
to 4mOhm bottom FET, while the top FET has 12 mOhm Rdson.
95.00
90.00
85.00
80.00
75.00
70.00
65.00
0
Efficency (%)
10
20
30
40
50
60
70
I_out(A)
Fig. 10 - Typical efficiency curve for 12 mOhm top FETs and 4 Ohm bottom FETs.
2005 Semtech Corp.
15
www.semtech.com
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