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A7986ATR Datasheet(PDF) 37 Page - STMicroelectronics

Part # A7986ATR
Description  3 A step-down switching regulator for automotive applications
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A7986ATR Datasheet(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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