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The RT7241A provides a complete power supply for DDR3/DDR3L/LPDDR3/DDR4 memory systems. It integrates an Advanced Constant On-Time (ACOT<sup>TM</sup>) mode synchronous Buck converter with a 1.5A sink/source tracking linear regulator. <p align="justify">The PWM converter provides low quiescent supply current, high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage chipset RAM supplies in notebook computers. The ACOT<sup>TM</sup> control scheme handles wide input/output voltage ratios with ease and provides a very fast response to load transients with no external compensators. </p><p align="justify">The 1.5A sink/source VTT LDO maintains fast transient response only requiring 10&mu;F ceramic output capacitance. The RT7241A supports all of the sleep state controls placing VTT at high-Z in S3 and discharging VDDQ and VTT in S4/S5. </p><p align="justify">The RT7241A provides complete protection features including OCP, OVP, UVP, and thermal shutdown. The RT7241A is available in the UQFN-18L 3x4 package.</p>
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  • DDR3/DDR3L/LPDDR3/DDR4 Complete Solution
  • PWM Converter (VDDQ)
    ► 100μA Low Quiescent Supply Current at S3 Mode
    ► ACOTTM Mode Performs Fast Transient Response
    ► Support MLCC Output Capacitors
    ► Integrated Low On-Resistance MOSFETs
  • 17mΩ of High-Side MOSFET
  • 4.5mΩ of Low-Side MOSFET
    ► Adjustable from 0.6V to 1.5V Output Range for 1.5V (DDR3), 1.35V (DDR3L), 1.2V (LPDDR3) and 1.2V (DDR4)
    ► 4.5V to 23V Battery Input Range
    ► 500kHz Switching Frequency
    ► Resistor Adjustable Valley Current Limit
    ► Over-/Under-Voltage Protection
    ► Internal Voltage Ramp Soft-Start
    ► Power Good Indicator
  • 1.5A LDO (VTT)
    ► Capable to Sink and Source up to 1.5A
    ► LDO Input Available to Optimize Power Losses
    ► Require Only 10μF Ceramic Output Capacitor
    ► Integrated Divider Tracks 1/2 VDDQ for VTT
    ► Accuracy ±20mV for VTT
    ► Support High-Z in S3 and Soft-Off in S4/S5
  • Tracking Mode Discharge Control
  • Thermal Capable Flip-chip (FC) Package for 12A VDDQ Converter and 1.5A VTT LDO
  • RoHS Compliant and Halogen Free
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DDR3/DDR3L/LPDDR3/DDR4 Memory Power Supplies<br />Notebook computers
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