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L5963 Fiches technique(PDF) 32 Page - STMicroelectronics

No de pièce L5963
Description  Dual monolithic switching regulator with LDO and HSD
PDF  45 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5963 Fiches technique(HTML) 32 Page - STMicroelectronics

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Application information
L5963
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DocID028553 Rev 1
The next higher available value should be used, so L = 22 μH.
STEP 2 -Inductor peak current
Using Equation 14, the peak inductor current is:
Equation 14
STEP 3 - Calculate the output capacitance
Using Equation 15, the output capacitance is:
Equation 15
So choose two 10 μF ceramic capacitors in parallel, and the voltage ripple is within the spec.
Equation 16
(ESR can be neglect due to ceramic cap)
IL(peak) = Iout(max) + IL /2 = 3 A + (0.9/2) A= 3.45 A



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