1、Features

  • Regulated Output with Input Voltage Above,Below, or Equal to the Output.

  • 1A Output Current at 3.3V in Step DownMode (VIN = 3.6V to 5.5V).

  • Up to 800mA Output Current at 3.3V inBoost Mode (VIN > 2.8V).

  • Single Inductor.2.5V to 5.5V Input Voltage Range.

  • Fixed and Adjustable Output Voltage Optionsfrom 1.8V to 5.5V.

  • Up to 95% Efficiency.

  • Stable with Low ESR Ceramic Capacitors.

  • No Schottky Diode Required.

  • Output Disconnect in Shutdown.

  • <1uA Shutdown Current.

  • <65uA Quiescent Current.

  • Power Saving Mode for Improved Light Effi-ciency Operation.

  • Forced Fixed Frequency Operation Mode.

  • Load Disconnect During Shutdown.

  • Undervoltage Lockout Protection.



  • 2、Applications


    • All Three-Cell Alkaline, NiCd or NiMH or Sin-gle-Cell Li Battery

    • MP3 Players

    • Handheld Instruments

    • Digital Cameras

    • Smart Phones

    • Portable GPS Units

    • Miniature Hard Disk Drive Power

    • 3、Description

      The PL9001 is a 1.0A output, low-noise,pulse-width-modulated (PWM) buck-boost DC-DC converter that operates from input voltageabove, below, or equal to the output voltage.The device features two internal synchronousrectifiers for high efficiency; it requires no ex-ternal Schottky diode. Internally fixed-frequency 2.5MHz operation provides easypost-filtering and allows the use of small induc-tors and capacitors. At low load currents theconverter enters the Power Saving Mode tomaintain a high efficiency over a wide loadrange. The Power Saving Mode could be dis-abled, forcing PL9001 to operate atPWM mode. The PL9001 is ideally suited forsingle Li-Ion battery applications. It is alsouseful for three-cell alkaline, NiMH, or NiCdapplications. Shutdown mode places thedevice in standby, reducing quiescent supplycurrent to under 1μA.Other features of the PL9001 include internalsoft-start, internal compensation, short circuitprotection, current limit, and over temperatureprotection. The device is packaged in a 10-pinDFN package measuring 3 mm x 3 mm.


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