NCP5220 ,3-in-1 PWM Dual Buck and Linear Power ControllerFeaturesWL = Wafer Lot• Pb−Free Package is Available*YY = YearWW = Work Week• Incorporates Synchron ..
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NCP5220
3-in-1 PWM Dual Buck and Linear Power Controller
NCP5220
3−in−1 PWM Dual Buck and
Linear Power Controller
The NCP5220 3−in−1 PWM a Dual Buck and Linear Power
Controller, is a complete power solution for MCH and DDR memory.
This IC combines the efficiency of PWM controllers for the VDDQ
supply and the MCH core supply voltage with the simplicity of linear
regulator for the VTT termination voltage.
This IC contains two synchronous PWM buck controller for driving
four external N−Ch FETs to form the DDR memory supply voltage
(VDDQ) and the MCH regulator. The DDR memory termination
regulator (VTT) is designed to track at the half of reference voltage
with sourcing and sinking current.
Protective features include, soft−start circuitry, undervoltage
monitoring of 5VDUAL, BOOT voltage and thermal shutdown. The
device is housed in a thermal enhanced space−saving DFN−20
package.
Features Pb−Free Package is Available* Incorporates Synchronous PWM Buck Controllers for VDDQ and
VMCH Integrated Power FETs with VTT Regulator Source/Sink up to 2.0 A All External Power MOSFETs are N−Channel Adjustable VDDQ and VMCH by External Dividers VTT Tracks at Half the Reference Voltage Fixed Switching Frequency of 250 kHz for VDDQ and VMCH Doubled Switching Frequency of 500 kHz for VDDQ Controller in
Standby Mode to Optimize Inductor Current Ripple and Efficiency Soft−Start Protection for All Controllers Undervoltage Monitor of Supply V oltages Overcurrent Protections for DDQ and VTT Regulators Fully Complies with ACPI Power Sequencing Specifications Short Circuit Protection Prevents Damage to Power Supply Due to
Reverse DIMM Insertion Thermal Shutdown 5x6 DFN−20 Package
Typical Applications DDR I and DDR II Memory and MCH Power Supply
*For additional information on our Pb−Free strategy and soldering details, please
