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L7985 Datasheet(PDF) 22 Page - STMicroelectronics

Part # L7985
Description  Voltage feed-forward
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7985 Datasheet(HTML) 22 Page - STMicroelectronics

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Application information
L7985
22/42
DocID022446 Rev 7
For example, with VOUT = 5 V, VIN = 24 V, IO = 2 A, L = 22 H, COUT = 22 F, and
ESR < 1 m
, the type III compensation network is:
In Figure 12 the module and phase of the open-loop gain is shown. The bandwidth is about
32 kHz and the phase margin is 51 °.
Figure 12. Open-loop gain Bode diagram with ceramic output capacitor
R1 4.99k
=
R2 680
=
R3 270
=
R4 1.1k
=
C3 4.7nF
=
C4 47nF
=
C5 1nF
=




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