4A, 18V High Efficiency PoL Regulators

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

    The FAN23SV04T is a highly efficient, integrated synchronous buck regulator for use in tracking applications, such as DDR termination rails. The VDDQ input includes an internal 2:1 resistive voltage divider to reduce total circuit size and component count. The regulator operates with an input range from 7 V to 18 V and supports up to 4 A load currents. The device can operate from a 5 V rail (±10%) if VIN, PVIN, and PVCC are connected together to bypass the internal linear regulator.

    This device utilizes Fairchild’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency.

    Switching frequency and sourcing over-current protection can be programmed to provide a flexible solution for various applications.

    Output over-current, and thermal shutdown protections help prevent damage during fault conditions. A hysteresis feature restarts the device when normal operating temperature is reached.


    • VIN Range: 7 V to 18 V Using Internal Linear Regulator for Bias
    • VIN Range: 4.5 V to 5.5 V with VIN/PVIN/PVCC Connected to Bypass Internal Regulator
    • High Efficiency
    • Continuous Output Current: 4 A
    • Internal Linear Bias Regulator
    • Internal VDDQ Resistor Divider
    • Excellent Line and Load Transient Response
    • Output Voltage Range: 0.5 to 1.5 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
    FAN23SV04TMPX Not Recommended For New Design as of 22-Sep-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 3SV04T

    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 FAN23SV04T

    This product is general usage and suitable for many different applications.
    Application Note Description
    AN-5074 PDFFAN23SV04T High-Efficiency Tracking Regulator Provides VDDQ Tracking VTT Supply or Programmable Tracking Ratio
    Last Update : 03-Jun-2015

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