Diodes Incorporated
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AUR9718B (Not Recommended for new design)

NRND = Not Recommended for New Design

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The AUR9718B is a high efficiency step-down DC-DC voltage converter. The chip operation is optimized by peak-current mode architecture with built-in synchronous power MOSFET switchers. The oscillator and timing capacitors are all built-in providing an internal switching frequency of 1.5MHz that allows the use of small surface mount inductors and capacitors for portable product implementations. Additional features including Soft Start (SS), Under Voltage Lock Out (UVLO), Thermal Shutdown Detection (TSD) and short circuit protection are integrated to provide reliable product applications. The device is available in adjustable output voltage versions ranging from 0.8V to VIN when input voltage range is from 2.7V to 5.5V, and is able to deliver up to 2.5A.


  • LCD TV
  • Set Top Box
  • Post DC-DC Voltage Regulation
  • PDA and Notebook Computer
  • Product Specifications

    Product Parameters

    Efficiency (%) 95
    Frequency Typ (Hz) 1500
    HS RDS(ON) (mΩ) 100
    LS RDS(ON) (mΩ) 100
    MaximumInput Voltage (V) 5.5
    MinimumInput Voltage (V) 2.7
    Output Current (mA) 2.5
    Output Voltage (V) ADJ
    Quiescent Current Typ (mA) 0.3
    Shutdown Current Typ (µA) 1
    Type Buck

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    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2380 2018-11-07 2019-05-07 Device End of Life (EOL)