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L6983 数据表(PDF) 39 Page - STMicroelectronics

部件名 L6983
功能描述  38 V, 3 A synchronous step-down converter with 17 μA quiescent current
PDF  63 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6983 数据表(HTML) 39 Page - STMicroelectronics

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Figure 37. Efficiency VIN = 12 V; VOUT = 5 V; FSW = 0.4 MHZ (log scale)
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
IOUT [A]
VIN = 12 V; VOUT = 5 V ; FSW = 0.4 MHz
LCM
LNM
Figure 38. Power losses VIN = 12 V; VOUT = 5 V; FSW = 0.4 MHZ
0
2
4
6
8
10
12
14
16
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0
0.5
1
1.5
2
2.5
3
IOUT [A]
VIN = 12 V ; VOUT = 5 V ; FSW = 0.4 MHz
LCM
LNM
POUT
The following three figures show the efficiency and power losses acquired on the standard evaluation board of the
device, STEVAL-ISA208V1, selecting the following output filter:
•
COUT:
–
2 x CGA6P1X7R1C226M250AC 22 µF 16 V (TDK);
–
2 x CGA5L3X5R1H106K160AB 10 µF 50 V (TDK).
•
Inductor:
–
XAL6060-822ME (Coilcraft).
L6983
Efficiency curves
DS13116 - Rev 1
page 39/63



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