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LM53625-Q1: LM536255 Design issue from customer

Part Number: LM53625-Q1

Dear Sir/Ms.

The attachment is the circuit diagram of my customer. He asked if the input voltage is greater than 36V, will the output voltage become something? Is it a short circuit or is it greater than 6V? The customer also asked if the output voltage can be changed to 3.3V? Or can you recommend a more suitable solution?

LM536255-Power tree.pdf

Best Regards,

Kami Huang

  • Hi Kami,

    The input voltage from 36V to 40 V for a short time can be acceptable and if just for a short time, the output voltage is still 5V. Besides, the input voltage can never be higher than 40V.

    For LM536255QRNLRQ1, the output voltage is fixed, If you want to change the voltage to 3.3V, you can use LM536253QRNLRQ1 or use LM53625AQRNLRQ1 with appropriate feedback divider.

    Moreover, for 2.1MHz, the R82 seems too large. It can be set to be 0ohm.

    Best regards,