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TPS7A94: LDO replacement

d_zero
Genius 4915 points
Part Number: TPS7A94
Other Parts Discussed in Thread: TPS7A96, TPS7A33

Dear Team,

 

we would like to replace following LDO ( LT3045, LT1963, LT3015)

1) Please can you comment TPS7A94 as replacment for LT3045 (+5V out) in regards to output noise and PSRR?

2) Please can you commnet TPS7A94 or TPS7A96 as replacment for LT1963 (+4V out) in regards to load transient response, output noise and PSRR?

3) Do you can propose a replacment for LT3015 (-3.3V out) in regards to load transient? 

 

Best Regards,

d.

  • 0
    TI__Expert 7350 points

    Hello,

    I have some spec tables below to help with this and included the load regulation and the negative recommendation which would be closest TPS7A33:

      TPS7A96 TPS7A94 TPS7A33 LT3045 LT1963 LT3015
    Iout(Max)(A) 2 1 1 0.5 1.5 1.5
    Vin(Max)(V) 5.7 5.7 -3 20 20 -1.8
    Vin(Min)(V) 1.7 1.7 -36 1.8 2.5 -30
    Vout(Max)(V) 5.5 5.5 -1.2 15 20 -1.22
    Vout(Min)(V) 0.4 0.4 -33 --- 1.21 -29.3
    Fixed output options(V) Adj Adj Adj Adj 1.5, 1.8, 2.5, 3.3 2.5, 3, 3.3, 5, 12, 15
    PSRR @ 100
    KHz(dB)    		 60 78 64 78 38 40
    Noise(uVrms) 0.5 0.46 16 0.8 40 60
    Accuracy(%) 1 1 2.5 1 - -
    Dropout voltage
    (Vdo)(Typ)(mV)    		 250 150 290 260 340 310
    Load Reg 0.03mV 0.03mV 0.4%Vout 0.1mV 2mV 2mV
    Output capacitor type      Ceramic Ceramic Ceramic Non-Ceramic Ceramic Ceramic, Non-Ceramic
    Thermal resistance
    θJA(°C/W)    		 46.1 46 31 33 23 14
    Operating temperature
    range(C)    		 -40 to 125 -40 to 125 -40 to 125 -40 to 125 -40 to 125 -40 to 125
    Package size: mm2 9 mm2: 3 x 3 (WSON|10) 9 mm2: 3 x 3 (WSON|10) 25 mm2: 5 x 5 (VQFN|20) --- --- ---
    Rating Catalog Catalog Catalog Catalog Catalog Automotive
    Features Adjustable current limit, Enable, Foldback overcurrent protection, Output discharge, Power good, Soft start Adjustable current limit, Enable, Foldback overcurrent protection, Output discharge, Power good, Soft start Enable, Soft start Enable, Power good Enable Enable

    Regards,

    Andres