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LMR43610: Can I use in adjustable mode to make a 9.5V Rail

Allison McKenzie
Prodigy 20 points
Part Number: LMR43610

Hi,

Is it possible to use a LMR43610MB3RPER in adjustable mode to make a 9,5V rail (from a 13V input), the datasheet is a bit ambiguous with respect to this.  It says that Adjustable is possible, but only shows 4 parts in the part number tables.  The Vout option in section 10.1.2 and section 5 indicates it is OK:

VOUT OPTION: 3: 3.3-V fixed/adjustable

Section 9.2.2.1, Table 9-6 and section 5 make it look like it isn't possible

Table 6-1 is ambiguous when read with section 5.  The diagram in section 8.2 makes it look like it won't work

Please help!

  • 0
    TI__Guru 64365 points

    Hello

    Yes, you can use that device in adjustable mode.  It will automatically go into adjustable mode

    when it detects the resistor divider on the FB pin.  Table 9-6 shows values for a 9V output; so 9.5V is OK.

    You can choose a value for Rfbb close to 10k and then use this equation to calculate Rfbt = Rfbb*(Vout-1)

    You could use Rfbb = 11k and Rfbt = 93.1k

    Thanks