6A, 18V High Efficiency PoL Regulators

Not Recommended For New Design as of 22-Sep-2015

    The FAN2306 / FAN2306M are highly efficient integrated synchronous buck regulators. They are capable of operating with an input range from 4.5 V to 18 V, supporting 6 A continuous load currents.

    These devices utilize Fairchild’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency. The FAN2306 / FAN2306M utilize Pulse Frequency Modulation (PFM) mode to maximize light-load efficiency by reducing switching frequency when the inductor is operating in Discontinuous Conduction Mode (DCM) at light loads. The FAN2306 includes an ultrasonic mode with minimum frequency clamp to keep the switching frequency above the audible range, while the FAN2306M does not include the minimum frequency clamp to maximize efficiency to extremely 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. After thermal shutdown is activated, 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: 6 A
    • PFM Mode for Light-Load Efficiency
    • Ultrasonic or No-Ultrasonic Mode Options
    • Excellent Line and Load Transient Response
    • Precision Reference: ±1% Over Temperature
    • Output Voltage Range: 0.6 to 5.5 V
    • Programmable Frequency: 200 kHz to 1.5 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
    FAN2306MPX Not Recommended For New Design as of 22-Sep-2015
    Green as of Mar 2012
     China RoHS

    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: Mar 2017
    Line 1$Y (Fairchild logo)
    &Z (Plant Code)
    &3 (3-Digit Date Code)

    Line 2FAN23

    Line 306

    RƟJA 35°C/W

    RƟJC 2.7°C/W

    Moisture Sensitivity Level (MSL) 1

    Max Reflow Temp 260

    PDF RoHS IPC1752
    XML RoHS IPC1752
    PDF China RoHS

    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.
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    This product is general usage and suitable for many different applications.

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