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L6983 Datasheet(PDF) 39 Page - STMicroelectronics

Part # L6983
Description  38 V, 3 A synchronous step-down converter with 17 μA quiescent current
PDF  63 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6983 Datasheet(HTML) 39 Page - STMicroelectronics

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Figure 37. Efficiency VIN = 12 V; VOUT = 5 V; FSW = 0.4 MHZ (log scale)
0
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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
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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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