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L5963 Fiches technique(PDF) 35 Page - STMicroelectronics

No de pièce L5963
Description  Automotive dual monolithic switching regulator with LDO and HSD
PDF  49 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5963 Fiches technique(HTML) 35 Page - STMicroelectronics

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L5963
Application information
48
STEP 4 - Calculate loop compensation values.
Using Equation 17 to determine the "double pole":
Equation 17
Using Equation 18 to determine the zero due to the ESR of the output capacitor Cout with
ESR = 10 m
:
Equation 18
DBW = fc = 0.14 x fsw = 35kHz
Choose R1 = 5 k
, using Equation 19:
Equation 19
R4 =1.24 kΩ
PWM modulator gain.
Equation 20
Where VIN is the typical input operating voltage, VOSC is the saw-tooth peak-to-peak value.
Using Equation 21:
Equation 21
R2 = 2.4 kΩ
Using Equation 22:
Equation 22
Choose C2 = 16 nF
Using Equation 23:
Equation 23



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