SA25903BBAT-Products-Silergy Corp

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SA25903BBAT

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High-Efficiency, 6V, 3A 2.3MHz Synchronous Step-Down Regulator
Datasheet
SA25903BBAT High-Efficiency, 6V, 3A 2.3MHz Synchronous Step-Down Regulator Datasheet
    Part numberSA25903BBAT
    Channel(#)1
    Vin (min) (V)2.8
    Vin (max) (V)6
    Switching frequency (min)(kHz)2300
    Switching frequency (max)(kHz)2300
    Vout (min) (V)0.6
    Vout (max) (V)6
    Iout (max) (A)3
    Vout2 (min)(V)
    Vout2 (max )(V)
    Iout2 (max)(A)
    Vref accuracy (±%)1
    Vout accuracy(±%)
    Control modePeak current control
    Duty cycle (max)(%)100
    Operation modePFM/FCCM
    Iq (typ) (uA)35
    FeaturesEnable,Power good,Auto-Discharge,Fixed soft-start,Low Iq,Thermal shutdown,UVP with hiccup,100% duty cycle,Low shutdown current,Spread spectrum,Cycle by cycle current limit,Precise Ref accuracy,PWM or PFM selectable in light load,Internal compenstation,Smooth prebias start up
    PackageSOT583
    Operating temperature range(°C)-40 to 125
    Functional safety categoryFunctional safety capable

    ·       2.8V~6V Input Voltage Range

    ·       Up to 3A Output Current Capability

    ·       Low RDS(ON) for Internal Switches (Top/Bottom): 65mΩ/25mΩ

    ·       Constant Frequency Peak Current Mode Control

    ·       35µA Quiescent Current (Typ.)

    ·       2.5µA Shutdown Current (Typ.)

    ·       ±1% 0.6V Reference Over -40°C to +150°C

    ·       2.3MHz Switching Frequency

    ·       Internal Soft-Start Limits Inrush Current

    ·       Forced PWM or PFM Operation Selectable in Light Load

    ·       100% Duty Cycle Dropout Operation

    ·       Power-Good Indicator

    ·       Hiccup Mode for Short-Circuit Protection

    ·       Compact SOT583 Package

    ·       Automotive AEC-Q100 Grade 1 Qualified

    ·       MSL Rating: MSL1

    The SA25903B is a high-efficiency 2.3MHz synchronous step-down converter that operates over an input voltage range of 2.8V to 6V, and can deliver an output current of up to 3A. It integrates very low RDS(ON) main and synchronous MOSFETs to minimize conduction loss. The 2.3MHz constant switching frequency reduces the required external inductor and capacitor values. 

    The SA25903B utilizes a constant frequency peak current mode control architecture to achieve stable operation across a wide range of conditions. It also provides cycle-by-cycle current limit protection, output short-circuit protection, and overtemperature protection.

    The SA25903B is available in a space-saving SOT583 package.

    Technical Documentation