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XC9508 - Synchronous Step-Down DC/DC Converter

Description

The XC9508 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in series with the DC/DC converter's output.

A voltage detector is also built-in.

A highly efficient, low noise output is possible since the regulator is stepped-down further from the DC/DC output.

Features

  • put Voltage Range Low ESR Capacitor VD Function Output Voltage Range Output Current Controls : 2.4V ~ 6.0V : Ceramic capacitor compatible : N-channel open drain output : 1.6V ~ 4.0V (Accuracy ± 2%) : 600mA (for MSOP-10 package) 400mA (for USP-10 package) : PWM Control PWM, PWM/PFM Automatic Switching External Oscillation Frequency Output Voltage Range Current Limit Dropout Voltage High Ripple Rejection : 0.9V ~ 4.0V (Accuracy ± 2%) : 300mA : 80mV @ IOUT=100mA (VOUT=2.8V) : 60dB.

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Full PDF Text Transcription

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June 9, 2005 V7 ◆Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator plus Voltage Detector ◆Step-Down DC/DC Converter's Output Connected in Series with LDO Regulator ◆High Efficiency, Low Noise Regulated Output ◆Ultra Small Packages: MSOP-10, USP-10 ◆Small-Footprint ◆Output Current DC/DC:600mA, VR: 200mA ◆Ceramic Capacitor Compatible (Low ESR Capacitors) ■APPLICATIONS ●CD-R / RW, DVD ●HDD ●PDAs, portable communication modem ●Cellular phones ●Palmtop computers ●Cameras, video recorders ■GENERAL DESCRIPTION The XC9508 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in series with the DC/DC converter's output. A voltage detector is also built-in.
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