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NCP5218 pdf datasheet (2−
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2008-10-22
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NCP5218 2−in−1 Notebook DDR Power Controller
The NCP5218 2−in−1 Notebook DDR Power Controller is
specifically designed as a total power solution for notebook DDR
memory system. This IC combines the efficiency of a PWM
controller for the VDDQ supply with the simplicity of linear
regulators for the VTT termination voltage and the buffered low noise
reference. This IC contains a synchronous PWM buck controller for
driving two external NFETs to form the DDR memory supply
voltage (VDDQ). The DDR memory termination regulator output
voltage (VTT) and the buffered VREF are internally set to track at the
half of VDDQ. An internal power good voltage monitor tracks VDDQ
output and notifies the user whether the VDDQ output is within target
range. Protective features include soft−start circuitries, undervoltage
monitoring of supply voltage, VDDQ overcurrent protection, VDDQ
overvoltage and undervoltage protections, and thermal shutdown.
The IC is packaged in DFN22.
The NCP5218 2−in−1 Notebook DDR Power Controller is
specifically designed as a total power solution for notebook DDR
memory system. This IC combines the efficiency of a PWM
controller for the VDDQ supply with the simplicity of linear
regulators for the VTT termination voltage and the buffered low noise
reference. This IC contains a synchronous PWM buck controller for
driving two external NFETs to form the DDR memory supply
voltage (VDDQ). The DDR memory termination regulator output
voltage (VTT) and the buffered VREF are internally set to track at the
half of VDDQ. An internal power good voltage monitor tracks VDDQ
output and notifies the user whether the VDDQ output is within target
range. Protective features include soft−start circuitries, undervoltage
monitoring of supply voltage, VDDQ overcurrent protection, VDDQ
overvoltage and undervoltage protections, and thermal shutdown.
The IC is packaged in DFN22.
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