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L7986 データシート(PDF) 37 Page - STMicroelectronics

部品番号 L7986
部品情報  3 A step-down switching regulator
PDF  43 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7986 データシート(HTML) 37 Page - STMicroelectronics

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DocID022450 Rev 6
37/43
L7986
Application ideas
43
As in the positive buck-boost, the maximum output current according to application
conditions is shown in Figure 37. The dashed line considers a more accurate estimation of
the duty cycles given by Equation 44, where power losses across diodes and the internal
power MOSFET are taken into account.
Equation 44
Figure 37. Maximum output current according to switch max. peak current (3.0 A):
VO = - 5 V
D
VOUT VD
–
V
– IN VSW VOUT VD
–
+
–
-----------------------------------------------------------------
=



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