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L6986H Datasheet(PDF) 23 Page - STMicroelectronics

No. de pieza L6986H
Descripción Electrónicos  38 V, 2 A synchronous step-down switching regulator with 30 μA quiescent current
PDF  68 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6986H Datasheet(HTML) 23 Page - STMicroelectronics

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Figure 18. Light-load efficiency comparison at different ISKIP - linear scale
50
55
60
65
70
75
80
85
90
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
ILOAD [A]
VIN=13.5 V; VOUT=3.3V; fsw=500kH z
LNM - SWO
LCM_ISKIPH - SWO
LCM_ISKIPL - SWO
LCM ISKIPH=600mA
LCM ISKIPL=200mA
LNM
Figure 19. Light-load efficiency comparison at different ISKIP - log scale
0
10
20
30
40
50
60
70
80
90
100
1
.
0
1
0
.
0
1
0
0
.
0
ILOAD [A]
VIN=13.5V; VOUT=3.3 V; fsw=5 00kH z
LNM - SWO
LCM_ISKIPH - SWO
LCM_ISKIPL - SWO
LCM ISKIPH=600mA
LCM ISKIPL=200mA
LNM
Figure 20. LCM operation with ISKIPH = 600 mA typ. at zero load and Figure 21. LCM operation with ISKIPL =
200 mA typ. at zero load show the LCM operation at the different ISKIP level.
Figure 20. LCM operation with ISKIPH = 600 mA typ. at zero load shows the ISKIPH = 600 mA typ. and so 50 mV
output voltage ripple.
Figure 21. LCM operation with ISKIPL = 200 mA typ. at zero load shows the ISKIPL = 200 mA typ. and so less
than 20 mV output voltage ripple.
L6986H
Light-load operation
DS12905 - Rev 2
page 23/68



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