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L6986 Datasheet(PDF) 41 Page - STMicroelectronics

No. de pieza L6986
Descripción Electrónicos  38 V, 2 A synchronous step-down switching regulator with 30 A quiescent current
PDF  68 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6986 Datasheet(HTML) 41 Page - STMicroelectronics

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L6986
Closing the loop
68
Equation 36
Example 2
Considering VIN = 12 V, VOUT = 3.3 V, L = 6.8 H, COUT = 15 F, fSW = 500 kHz.
The maximum system bandwidth is 80 kHz. Assuming to design the compensation network
to achieve a system bandwidth of 70 kHz:
Equation 37
Equation 38
so accordingly with Equation 34 and Equation 36:
Equation 39
Equation 40
CC
5
2
 R
C BW

--------------------------------------
=
fPOLE
6kHz
=
RLOAD
VOUT
IOUT
--------------
2.2
==
RC
68k
=
CC
168pF 180pF
=



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