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The RT9758D is a high efficiency switching capacitor converter for input &gt;7.4V application. The efficiency is up to 98.1% when V<sub>OUT</sub> = 10V, I<sub>OUT</sub> = 2A, switching frequency = 500kHz, dual phase with VBUS input in cap divider mode. The device integrates two phase switching capacitor topology (DIV2 mode), bypass mode, an input reverse blocking MOS and 9-way protections. The default operation mode of the device is DIV2 mode. User can use I<sup>2</sup>C to select the device operating in bypass mode or reverse DIV2 mode or reverse bypass mode. The maximum output current is 6A with DIV2 mode or 5A with bypass mode. In present mode (<span style="text-decoration: overline">EN</span> = H), the host can still issue commands by the I<sup>2</sup>C serial interface.<br />The recommended junction temperature range is -40&deg;C to 125&deg;C, and the ambient temperature range is -40&deg;C to 85&deg;C.
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  • Integrated Bidirectional Bypass Mode and Cap Divider Mode (DIV2 Mode)
  • Input Reverse Blocking NFET between WRX_IN Pin and VBUS Pin
    ► Block the Reverse Current
  • Dual-Phase Charge Pump Core
    ► 6A Output Current Ability with DIV2 Mode and 5A with Bypass Mode
    ► Efficiency Up to 98.1% when VOUT = 10V, IOUT = 2A, Switching Frequency = 500kHz and Dual Phase with VBUS Input in DIV2 Mode
    ► 300kHz to 1.5MHz Variable Switching Frequency Stay Out of Audio Band
    ► Spread Spectrum Technology for EMI Reduction
    ► Adjustable Single-Phase or Dual-Phase for DIV2 Mode
    ► Programmable Pre-Charge Current and Pre-Charge Timing for Charge Soft-Start
    ► Support Converter Soft-Start with 500mA Loading
  • Support Synchronize Function for Parallel Application
  • Operation Mode Transfer Automatically between Bypass Mode and DIV2 Mode (AT_Function)
  • I2C is Available when Device in Present Mode
  • 3-Error Charge Pump Switch Protection
    ► VBUS Voltage Too Low Error Protection before Switch (VBUS_LOW_ERR)
    ► CFLY Short Error Protection Before Switch (CFLY_DIAG)
    ► Converter Overcurrent Protection (CON_OCP)
  • 6-Way System Protection
    ► VBUS Overvoltage Protection (VBUS_OVP)
    ► IBUS Overcurrent Protection (IBUS_OCP)
    ► VOUT Overvoltage Protection (VOUT_OVP)
    ► WRX Reverse Overcurrent Protection (WRX_IRE_OCP)
    ► VOUT Short Error Protection Before Charge (VOUT_ERR)
    ► Junction Over-Temperature Protection (TDIE_OTP)
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Keyword 1

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