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LMR14030-Q1: Schematic review

Part Number: LMR14030-Q1

Hi Team,

Could you help check the schematic of LMR14030-Q1? Thanks!

Regards,

Cera

  • Hi Cera,

    Here are some things I noticed:

    • R28/R29 feedback resistors look good
    • Rt is the correct value if a 1820kHz switching frequency is needed
    • L4 output inductance needs to be increased to prevent a large ripple current--ensure that the maximum Vin (including transients) is used to solve for min inductance not just typical Vin
    • C224/C225/C226 output caps look good assuming a full load step and 5% for the Vout transient
    • Be sure to use a Schottky diode that is rated 25% higher than Vin and at least 3.5A PD2 does not seem to be Schottky
    • C222/C223 input caps look fine. The high freq filtering cap (C216) should be 0.1uF according to the datasheet
    • C230 Cboot is good
    • C237/C238 Soft start caps are in range

    Best,

    Christine

  • I am closing this thread due to inactivity. You can reopen if you need more help.

    Best,

    Christine