15A, 18V High Efficiency PoL Regulators

Not Recommended For New Design as of 05-Oct-2015

    The FAN2315 is a highly efficient integrated synchronous buck regulator. The regulator is capable of operating with an input range from 4.5 V to 18 V and supporting up to 15 A load currents.

    The FAN2315 utilizes Fairchild’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency. The device utilizes Pulse Frequency Modulation (PFM) mode to maximize light-load efficiency by reducing switching frequency when the inductor is operating in discontinuous conduction mode at light loads.

    Switching frequency and over-current protection can be programmed to provide a flexible solution for various applications. Output over-voltage, under-voltage, over-current, and thermal shutdown protections help prevent damage to the device during fault conditions. A hysteresis feature restarts the device when normal operating temperature is reached.


    • VIN Range: 4.5 V to 18 V
    • High Efficiency: Over 96% Peak
    • Continuous Output Current: 15 A
    • PFM Mode for Light-Load Efficiency
    • Output Voltage Range: 0.6 to 5.5 V
    • Programmable Frequency: 200 kHz to 1 MHz
    • Programmable Soft-Start
    • Low Shutdown Current
    • Adjustable Sourcing Current Limit
    • Internal Boot Diode
    • Thermal Shutdown
    • Halogen and Lead Free, RoHS Compliant
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    Product Product &
    Eco Status
    Replacement Part Number Packing Method Convention Package Marking
    FAN2315MPX Not Recommended For New Design as of 05-Oct-2015
    Green as of Mar 2012

    PQFN 5x5.5 34L  -  Details
    1.1 x 5.5 x 5.0mm,  TAPE REEL

    PDF PQFN 5x5.5 34L  Drawing
    Last Update: Jan 2015 PDF PQFN Tape and Reel Packing Drawing
    Last Update: Oct 2015
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &3 (3-Digit Date Code)

    Line 2FAN23

    Line 315

    RƟJA 35°C/W

    RƟJC 2.7°C/W

    Moisture Sensitivity Level (MSL) 1

    Max Reflow Temp 260

    PDF RoHS IPC1752
    XML RoHS IPC1752

    If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
    * Click here for further top mark packaging information for FAN2315

    This product is general usage and suitable for many different applications.
    Application Note Description
    AN-4162 PDFSwitch Node Ring Control in TinyBuck® Regulators
    Last Update : 03-Jun-2015

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