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A7986ATR データシート(PDF) 37 Page - STMicroelectronics

部品番号 A7986ATR
部品情報  3 A step-down switching regulator for automotive applications
PDF  42 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A7986ATR データシート(HTML) 37 Page - STMicroelectronics

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DocID022801 Rev 5
37/42
A7986A
Application ideas
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 45, where power losses across diodes and the internal
power MOSFET are taken into account.
Equation 45
Figure 37. Maximum output current according to switch max. peak current (3.0 A):
VO = - 5 V
D
V
OUT
V
D
–
V
–
IN
V
SW
V
OUT
V
D
–
+
–
-----------------------------------------------------------------
=



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