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TLV774: PSRR>75dB(1kHz) solution

Kailun Liu
Expert 3003 points
Part Number: TLV774
Other Parts Discussed in Thread: TLV773, TPS7A20, TPS7A20L, TPS7A21-Q1, LP5912, LP5912-Q1, LP5912-EP, LP38798, TPS7A96, TPS7A57, TPS7A8101-Q1, TPS7H1111-SEP, TPS7H1111-SP

Tool/software:

Dear Team,

I am looking for a LDO, VIN=5V, VOUT=1.8V, IOUT<300mA, PSRR>=75dB at 1kHz, can you promote a device for me? 

I notice that the best choice I found is TLV773 with 72dB (1kHz).

  • +1
    TI__Expert 4840 points

    The TPS7A20 (VIN<6,IOUT<300mA,PSRR=95dB@1kHz) should work for your application

    In case you wanted to know more here's a list of all the parts I identified that could fit within these specs:

    Fixed Output (with 1.8VOUT option):

    Chip Max IOUT (mA) Max VIN (V) PSRR @ 1kHz Rating
    TPS7A20 300 6 95 dB Catalog
    TPS7A20L 300 6 95 dB Catalog
    TPS7A21-Q1 500 6 91 dB Automotive
    LP5912 500 6.5 75 dB Catalog
    LP5912-Q1 500 6.5 75 dB Automotive
    LP5912-EP 500 6.5 75 dB HiRel Enhanced Product

    Adjustable Output:

    Chip Max IOUT (mA) Max VIN (V) VOUT Min - VOUT Max PSRR @ 1kHz Rating
    LP38798 800 20 1.2   -    19.8 >= 100 dB Catalog
    TPS7A96 2000 5.7 0      -    5.5 104 dB Catalog
    TPS7A57 5000 6 0.5   -    5.2 100 dB Catalog
    TPS7A8101-Q1 1000 6.5 0.8   -    6 80 dB Automotive
    TPS7H1111-SEP 1500 7 0.4   -    5.5 109 dB Space
    TPS7H1111-SP 1500 7 0.4   -    5.5 109 dB Space
  • 0 in reply to Gregory Thompson
    TI__Expert 3003 points

    Thanks Gregory, you're my hero.