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SA25903BAT

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High-Efficiency, 6V, 3A 2.2MHz Synchronous Step-Down Regulator
Datasheet
SA25903BAT High-Efficiency, 6V, 3A 2.2MHz Synchronous Step-Down Regulator Datasheet
    Part numberSA25903BAT
    Channel(#)1
    Vin (min) (V)2.8
    Vin (max) (V)6
    Switching frequency (min)(kHz)2200
    Switching frequency (max)(kHz)2200
    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,UVP with hiccup,100% duty cycle,Low ISD,Spread spectrum,Cycle by cycle overcurrent protection,Forced PWM,Pre-bias startup
    PackageSOT583
    Operating temperature range(°C)-40 to 125
    Functional safety categoryCapable
    • 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
    • 2.2MHz Switching Frequency
    • Internal Soft-Start Limits Inrush Current
    • Forced PWM or PFM Operation Selectable in Light Load
    • 100% Duty Cycle Dropout Operation
    • Spread Spectrum Clocking
    • Power-Good Indicator
    • Hiccup Mode for Short-Circuit Protection
    • Compact SOT583 Package
    • Automotive AEC-Q100 Grade 1 Qualified
    • MSL Rating: MSL1
    The SA25903 is a high-efficiency 2.2MHz 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 2.2MHz constant switching frequency reduces the required external inductor and capacitor values.  
    The SA25903 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 SA25903 is available in a space-saving SOT583 package.

    Evaluation Board

    • SA25903_1

      Photo of evaluation board

    • SA25903_2

      Photo of evaluation board

    • SA25903_3

      Photo of evaluation board

    EVB_SA25903BAT

    The EVB_SA25903BAT is intended for evaluating 6V/3A synchronous step-down regulator. 

    Technical Documentation