SA24504XNQ-Products-Silergy Corp

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SA24504XNQ

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High Efficiency, 36V Input, 4A Synchronous Step-Down Regulator
Datasheet
SA24504XNQ High Efficiency, 36V Input, 4A Synchronous Step-Down Regulator Datasheet
    Part numberSA24504XNQ
    Channel(#)1
    Vin (min) (V)3.5
    Vin (max) (V)36
    Switching frequency (min)(kHz)300
    Switching frequency (max)(kHz)2300
    Vout (min) (V)1
    Vout (max) (V)34.2
    Iout (max) (A)4
    Vout2 (min)(V)
    Vout2 (max )(V)
    Iout2 (max)(A)
    Vref accuracy (±%)1
    Vout accuracy(±%)
    Control modePeak current control
    Duty cycle (max)(%)99.8
    Operation modePFM
    Iq (typ) (uA)11.5
    FeaturesEnable, Power good, Auto-discharge, Fixed soft-start, Low Iq, Wettable flanks package, UVP with hiccup, OVP, External bias input, Low ISD, Adjustable switching frequency, Spread spectrum, Cycle by cycle overcurrent protection, Frequency synchronization, Pre-bias startup
    PackageQFN3.5×4-14
    Operating temperature range(°C)-40 to 125
    Functional safety categoryCapable
    • 3.5V to 36V Input Voltage Range
    • Support 42V Load Dump
    • Support 3.0V Cold Crank
    • 4A Output Current Capability
    • Low RDS(ON) for Internal Switches: 41mΩ Top, 21mΩ Bottom
    • Typical 11.5µA Quiescent Current and 1µA Shutdown Current.
    • 300kHz to 2.3MHz Switching Frequency
    • Synchronization to External Clock
    • Spread Spectrum Function
    • Hiccup Mode Output Short-Circuit Protection
    • EN On/Off Control with Accurate Threshold
    • Cycle-by-Cycle Peak Current Limit
    • Power Good Indicator
    • 1V ±1% Reference Voltage Over -40˚C to 150˚C Temperature Range
    • QFN3.5×4-14 Package with Wettable Flanks
    • Automotive AEC- Q100 Grade 1 Certified

     

    The SA24504 is a high-efficiency synchronous step-down DC-DC regulator featuring internal power and synchronous rectifier switches. It operates with fixed frequency and peak current control across a wide input voltage range of 3.5V to 36V, delivering up to 4A of continuous output current.

    The SA24504 is specifically designed with a symmetric QFN package and adjustable LX rise time to achieve optimal EMI performance. The switching frequency can be adjusted from 300kHz to 2.3MHz, or synchronized to an external clock. The frequency selection allows for compliance with application EMI limits and helps to avoid noise in critical frequency bands.

    The SA24504 offers excellent efficiency across a wide range of applications by providing internal 41mΩ power and 21mΩ synchronous rectifier switches, frequency reduction at light load conditions, and an external bias input. The 1μA shutdown supply current enables the device to be used in battery-powered applications. The SA24504 ensures safe operation under all conditions, offering cycle-by-cycle current limiting, input under-voltage lockout, internal soft-start, output under-voltage and over-voltage protection, and thermal shutdown.

    The SA24504 is available in a QFN 3.5×4-14 package with wettable flanks.

    Technical Documentation