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TLD5099EP: Selecting inductor in boost-to-ground topology

TLD5099EP: Selecting inductor in boost-to-ground topology

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Two equations are needed to choose the correct value of inductance for the DC-DC:
* The first equation determines the minimum inductance L_min as a function of the input and output voltages V_IN and V_OUT, as well as the switching frequency f_sw and the ripple current ΔI_L:
L_min ≥ (V_OUT-V_IN)/V_OUT * V_IN/(ΔI_L * f_sw)
* The second equation gives the minimum inductance to prevent discontinuous conduction mode (DCM) as a function of the maximum input voltage V_IN_MAX and the minimum input current I_IN_MIN:
L_min ≥ (V_OUT-V_IN)/V_OUT * V_IN_MAX/(2*I_IN_MIN * f_sw)
For further information check the https://www.infineon.com/dgdl/Infineon-TLD5099EP-DataSheet-v01_00-EN.pdf?fileId=5546d462700c0ae60170... TLD5099EP datasheet, while more information on how to design a proper solution can be found in the  https://www.infineon.com/dgdl/Infineon-Z8F66213399_DRL_driver_with_TLD5099EP_B2G-AN-ApplicationNotes... Z8F66213399 DRL driver with DRL5099EP B2G-AN application note.