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L7985 Datenblatt(PDF) 36 Page - STMicroelectronics

Teilenummer L7985
Bauteilbeschribung  Voltage feed-forward
PDF  42 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7985 Datenblatt(HTML) 36 Page - STMicroelectronics

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L7985
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DocID022446 Rev 7
VCC and GND (38 V). Therefore, if the output is -5 V, the input voltage can range from 4.5 V
to 33 V.
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 (2.0 A):
VO = - 5 V
D
VOUT VD
–
V
– IN VSW VOUT VD
–
+
–
-----------------------------------------------------------------
=



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