NCP5220A
3−in−1 PWM Dual Buck and Linear Power Controller
The NCP5220A 3−in−1 PWM Dual Buck and Linear Power Controller...
NCP5220A
3−in−1 PWM Dual Buck and Linear Power Controller
The NCP5220A 3−in−1 PWM 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 controllers 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 half of the 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
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 Voltages Overcurrent Protections for DDQ and VTT
Regulators VTT
Regulators Soft−Start Current Protection Fully Complies wi...