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XC9248 - Synchronous Step-Down DC/DC Converter

Description

The XC9248 series is 18V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver transistors.

Features

  • Input Voltage ： 4.5V ~ 18V Output Voltage ： 1.0V ~ 12V (VFB=0.8V±1.5%) (.
  • 1) Output Current ： 2.2A Efficiency ： 93.8% (.
  • 1) @VIN=12V,VOUT=5V, IOUT=700mA Oscillation Frequency ： 500kHz Maximum Duty Cycle ： 79% Soft-Start Time ： Fixed 2.8ms, set by external capacitor Protection Circuit ： UVLO High side over current protection Low side over current protection VOUT Short-circuit Protection LX Short-circuit Protection VOUT Over voltage protection Thermal shutdown Package ：.

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Full PDF Text Transcription

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XC9248 Series ETR05022-008 18V Driver Transistor Built-In Synchronous Step-Down DC/DC Converter ■GENERAL DESCRIPTION The XC9248 series is 18V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver transistors. With an input voltage range from 4.5V to 18V and a maximum output current of 2.2A, the series is suitable for digital home appliance power supplies and can be used with small ceramic capacitors. The series has a 0.8V reference voltage, and using externally connected resistors, the output voltage can be set freely from 1.0V to 12V. The control method is synchronous PWM (Source/ Sink). The soft start time is internally set to 2.8ms (TYP.), also can be adjusted using external capacitor.
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