SY21175ADT-Products-Silergy Corp

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SY21175ADT (SY81053ADT)

Production
High Efficiency, 3.5A, 18V Input Synchronous Step Down Regulator
Datasheet
SY21175ADT High Efficiency, 3.5A, 18V Input Synchronous Step Down Regulator Datasheet
    Part numberSY21175ADT
    Channel(#)1
    Vin (min) (V)4.2
    Vin (max) (V)18
    Switching frequency (min)(kHz)
    Switching frequency (max)(kHz)500
    Vout (min) (V)0.594
    Vout (max) (V)0.606
    Iout (max) (A)3.5
    Vout2 (min)(V)
    Vout2 (max )(V)
    Iout2 (max)(A)
    Vref accuracy (±%)±1%
    Vout accuracy(±%)
    Control mode
    Duty cycle (max)(%)
    Operation mode
    Iq (typ) (uA)250
    FeaturesHic-cup for Short Circuit Protection, Output Auto-Discharge Function
    PackageTSOT23-6
    Operating temperature range(°C)-40°C to 125°C
    Functional safety category

    ·     Low RDS(ON) for Internal Switches (Top/Bottom): 80mΩ/40mΩ

    ·     4.2-18V Input Voltage Range

    ·     3.5A Output Current Capability

    ·     500kHz Switching Frequency Minimize the External Components

    ·     Stable with 10μF COUT and 3.3μH Inductor

    ·     Instant PWM Architecture to Achieve Fast Transient Responses

    ·     Internal Soft-start Limits the Inrush Current

    ·     Startup from Pre-biased Output

    ·     Cycle-by-cycle Peak/Valley Current Limitation

    ·     Hic-cup Mode Output Short Circuit Protection

    ·     Over Temperature Protection with Auto Recovery

    ·     Output Auto Discharge Function

    ·     ±1.0% Internal Reference Voltage

    ·     RoHS Compliant and Halogen Free

    ·     Compact Package: TSOT23-6

    The SY21175 develops high efficiency 500kHz synchronous step-down DC/DC converter capable of delivering 3.5A current. The device operates over a wide input voltage range from 4.2V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.

    The SY21175 adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 500kHz to minimize the size of the inductor and the capacitor.

    Evaluation Board

    • 1

      Photo of evaluation board

    • 2

      Photo of evaluation board

    EVB_SY21175ADT

    EVB_SY21175ADT is intended for evaluating 3.5A, 18V, 500kHz synchronous Buck regulator.

    Technical Documentation