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The RT6576F is a dual-channel step-down controller generating supply voltages for battery-powered systems. It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/3.3V linear regulators. Each linear regulator provides up to 100mA output current and 3.3V linear regulator provides 1% accuracy under 35mA. The RT6576F has an oscillator output to drive the external charge pump application. Other features include on-board power-up sequencing, a power-good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown. <p align="justify">A constant current ripple PWM control scheme operates without sense resistors and provides 100ns response to load transient. For maximizing power efficiency, the RT6576F automatically switches to the diode-emulation mode in light load applications. To eliminate noise in audio applications, an audio-skipping mode is included, which maintains the switching frequency above 25kHz. The RT6576F is available in the WQFN-20L 3x3 package.</p>
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  • Support Connected Standby Mode for Ultrabook
  • CCRCOT Control with 100ns Load Step Response
  • PWM Maximum Duty Ratio > 98%
  • 5V to 25V Input Voltage Range
  • Dual Adjustable Output :
    ► CH1 : 2V to 5.5V
    ► CH2 : 2V to 4V
  • 5V/3.3V LDOs with 100mA Output Current
  • 1% Accuracy on 3.3V LDO Output
  • Oscillator Driving Output for Charge Pump Application
  • Support Audio-Skipping Mode (ASM)
  • Internal Frequency Setting
    ► 300kHz/355kHz (CH1/CH2)
  • Internal Soft-Start and Soft-Discharge
  • 4700ppm/°C RDS(ON) Current Sensing
  • Independent Switcher Enable Control
  • Built-In OVP/UVP/OCP/OTP
  • Non-Latch UVLO
  • Power Good Indicator
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Notebook and Sub-Notebook Computers<br />System Power Supplies<br />2-Cell to 4-Cell Li+ Battery-Powered Devices
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