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    ST1S31D-R

    ST1S31D-R

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    ST1S31PUR

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    3 A DC step-down switching regulator
    Learn More about ST1S31PUR

    Quantity $ per Unit Savings
    1 - 9$1.830%
    10 - 24$1.6510%
    25 - 99$1.5515%
    100 - 168$1.3228%
    168 + Contact Sales
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    Parameter NameParameter Value
    Input Voltage Min Volt2.8
    Input Voltage Max Volt5.5
    ECCN USEAR99
    ECCN EUNEC
    Packing TypeTape And Reel
    RoHs compliantEcopack2
    GradeIndustrial
    Package NameVFDFPN 8 3x3x1.0

    The ST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The ST1S31 operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.


    The ST1S31 integrates a 60 mΩ high-side switch and a 45 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.


    The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.


    The ST1S31 device is available in 3 mm x 3 mm, 8 lead VFDFPN and SO8 packages.

    Key features
    • 3 A DC output current
    • 2.8 V to 5.5 V input voltage
    • Output voltage adjustable from 0.8 V
    • 1.5 MHz switching frequency
    • Internal soft-start and enable
    • Integrated 60 mΩ and 45 mΩ power MOSFETs
    • All ceramic capacitor
    • Power Good (POR)
    • Cycle-by-cycle current limiting
    • Current foldback short-circuit protection
    • VFDFPN 3 x 3 - 8L, SO8 packages
    Associated Products