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Original question:

LP2989: what is the best value TI 12V, 500mA LDO vs. EXAR SPX3819?

TPS7A26: Replacement solution to SPX3819

Ella KIM
Expert 4212 points
Part Number: TPS7A26
Other Parts Discussed in Thread: LP2989

Hi LDO folk,

I'm looking for SPX3819 replacement ;12VIN 3.3/5VOUT (adjustable type or fixed type). It looks the best fit is LP2989, but TPS7A26 is the newer device. Customer also can reduce the output capacitance, thereby possibly reducing the PCB space. Just want to double check :

(1) if TPS7A26 is a better suggestion to LP2989 

(2) anything we can highlight on TPS7A26 over SPX3819 

SPX3819 Datasheet (maxlinear.com)

TPS7A26

ACTIVE

LP2989

ACTIVE
TI.com inventory 951 550361
Output options
Adjustable Output
Fixed Output
 Fixed Output
Iout (Max) (A) 0.5 0.5
Vin (Max) (V) 18 16
Vin (Min) (V) 2.4 2.1
Vout (Max) (V) 17.41 5
Vout (Min) (V) 1.24 2.5
Fixed output options (V)
1.25
1.8
2.5
3.3
5
2.5
2.8
3
3.3
3.8
5
Noise (uVrms) 300 18
Package Group
WSON | 6
SOIC | 8
VSSOP | 8
WSON | 8
Iq (Typ) (mA) 0.002 0.11
Thermal resistance θJA (°C/W) 73.3 35
Approx. price (USD)
$0.305 | 1ku
$1.078 | 1ku
Rating Catalog Catalog
Load capacitance (Min) (µF) 1 4.7
  • +1
    TI__Genius 12665 points

    Hi Ella, 

    Are they open for a non P2P option? If so, then TPS7A26 is a newer device compared to LP2989.

    Here is a quick comparison between TPS7A26 and SPX3819:

      SPX3819 TPS7A26
    AEC Q100 NO NO
    Output Options Adjustable Output, Fixed Output Adjustable Output, Fixed Output
    Iout (Max) (A) 0.5 0.5
    Vin (Max) (V) 16 18
    Vin (Min) (V) 2.5 2.4
    Vout (Max) (V) 15.3 17.41
    Vout (Min) (V) 1.235 1.24
    Fixed Output Options (V) 1.2, 1.5, 1.8, 2.5, 3, 3.3, 5, ADJ 1.25, 1.8, 2.5, 3.3, 5, ADJ
    Enable YES YES
    Power Good NO YES
    Output Capacitor Type Non-Ceramic Ceramic
    PSRR @ 100KHz (dB) - 22
    Noise (uVrms) 40 300
    Accuracy (%) 2 1
    Vdo (Typ) (mV) 180 355
    Iq (Typ) (mA) 0.8 0.002
    Thermal Resistance θJA (°C/W) 59 73.3
    Min Package Area (mm2) 6 4
    Package Type WSON, SOT-23, SOIC WSON

    Furthermore, there are some specs that show better performance with the TPS7A26 that have to be closely compared looking at the Data Sheet.

    For example Vdo, at full load condition over all temperature ranges, SPX3819 shows 700mV whereas TPS7A26 shows 590mV as MAX at full load for all temperature ranges.

    SPX3819:

    TPS7A26:

    Best, 

    Edgar Acosta

  • 0 in reply to Edgar Acosta1
    TI__Expert 4212 points

    Thanks Edgar for your great help!