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LP5912: LP5912 Vdrop

Jerry Chu
Genius 4915 points
Part Number: LP5912


Hi Expert,

I have the question about LP5912. If the VIN is 3.2V, Vout is 2.8V, the Vin - Vout = 0.4V, if the output current is 500mA, how about the Vdrop? (Because I see the datasheet shows that need 0.5V in Vin and Vout.)

Can you help it? Thanks!

  • 0
    TI__Guru 55940 points

    Hi Jerry,

    The dropout voltage for LP5912 is specified in the Electrical Characteristics table as a maximum of 250 mV at 500 mA.  As you have 400 mV of headroom (Vin - Vout), you have adequate headroom in order to maintain regulation.

    Additional headroom will improve certain performance characteristics such as PSRR; however, in order to maintain regulation, only 250 mV is required.

    Very Respectfully,

    Ryan