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LMR36503: LDO and DCDC Selection.

Allen Tang2
Prodigy 380 points
Part Number: LMR36503
Other Parts Discussed in Thread: LM5013

Dear Team,

I hope this message finds you well.
We are currently in need of two types of voltage regulators for our ongoing project, and we are seeking recommendations for suitable products.


Requirement 1 for LDO:
Input Voltage: 48V to 60V
Output Voltage: 5V
Output Current: 150mA
Package Type: small size


Requirement 2 for DCDC:
Input Voltage: 4.5V to 80V
Output Voltage: -10V
Output Current: 100mA
Package Type: small size


Thank you for your assistance. We look forward to exploring potential solutions.
Best regards,

Allen

  • 0
    TI__Mastermind 28995 points

    Hi Allen,

    Your input voltage requirement is quite high, so here's a potential idea. 

    I think you can do a two-stage solution, where you may first have a step down converter that supports 48V to 80V operation, like the LM5013, which can support up to 100V input voltage operation to a medium voltage like 12V or 24V. Then afterwards, you can follow up the initial stage with another regulator for the 5V output, and an IBB that can support the -10V rail. The LMR36503 can support the IBB, as well as the 5V operation. 

    Let me know if you have any other questions. 

    Thanks,

    Richard