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LM317: LDO with better PSRR than LM317 (SOT223) / LM337 (SOT223)

Wendy Wang1
Genius 17970 points
Part Number: LM317
Other Parts Discussed in Thread: LM337, LM340, LM7800

Hi team,

Do we have upgrade device of LM317 (SOT223) / LM337 (SOT223)? Like device with better PSRR?

Thank you for your help!

Best regards,

Wendy

  • +1
    TI__Expert 5656 points

    Hello Wendy,

    Below table shows a couple of options that have better PSRR.

      LM317 LM337 LM340 LM7800
    AEC Q100 NO NO NO NO
    Output Options Adjustable Output Adjustable Output, Negative Output Fixed Output Fixed Output
    Iout (Max) (A) 1.5 1.5 1.5 1.5
    Vin (Max) (V) 40 -3 35 30
    Vin (Min) (V) 3 -40 7.5 7.5
    Vout (Max) (V) 37 -1.2 15 15
    Vout (Min) (V) 1.25 -37 5 5
    Fixed Output Options (V) - - 5, 12, 15 5, 12, 15
    Enable NO NO NO NO
    Power Good NO NO NO NO
    Output Capacitor Type Non-Ceramic Non-Ceramic Cap Free, Ceramic Ceramic, Non-Ceramic
    PSRR @ 100KHz (dB) 38 19 50 48
    Noise (uVrms) 38 1110 40 40
    Accuracy (%) 5 2.4 2.5 3
    Vdo (Typ) (mV) 2000 2000 2000 2000
    Iq (Typ) (mA) 5 1.5 8 6
    Thermal Resistance θJA (°C/W) 24 23 24 24
    Min Package Area (mm2) 45.5 66.726 45.5 45.5
    Package Type DDPAK/TO-263, SOT-223, TO-220, TO-220 DDPAK/TO-263, TO-220, TO-252 DDPAK/TO-263, SOT-223, TO-220, TO-220 DDPAK/TO-263, SOT-223, TO-220

    Regards,

    Prakash L