NCP5203 Series

2-in-1 DDR Power Controller

Catalog

2-in-1 DDR Power Controller

Part	Package / Case	Supplier Device Package	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input [Max]	Voltage - Input [Min]	Mounting Type	Applications
ON Semiconductor NCP5203MNR2	18-VFDFN Exposed Pad	18-DFN (5x6)	2	70 °C	0 °C	5.5 V	4.5 V	Surface Mount	Controller DDR

Catalog

2-in-1 DDR Power Controller

Key Features

• Incorporates VDDQ, VTT Regulators

• Operates from Single 5.0V Supply

• All External Power MOSFETs are N-Channel

• Adjustable VDDQ

• Adjustable VTT

• Fixed Switching Frequency of 300 kHz for VDDQ in S0

• Fixed Switching Frequency of 600 kHz for VDDQ in S3

• Soft-Start Protection for VDDQ

• Undervoltage Monitor of 5VDUAL

• Short-Circuit Protection VDDQ and VTT

• Thermal Shutdown

• Housed in QFN-18

• VTT Regulator includes Integrated Power FETs Sourcing/Sinking up to 2.0A

• Pb-Free Package is Available*

Description

The NCP5203 2-in-1 DDR Power Controller is a complete power solution for an ACPI compliant high current DDR memory system. This IC combines the efficiency of a PWM controller for the VDDQ supply with the simplicity of linear regulator for the VTT termination voltage. The NCP5203 contains a synchronous PWM buck controller for driving two external NFETs to form the DDR memory supply voltage (VDDQ). The +/- 2.0A user adjustable VTT terminator regulator has short circuit protection. An internal power good function monitors both the VDDQ and VTT outputs and signals if a fault occurs. Protective features include soft-start, under-voltage monitoring of 5VDUAL, over current protection (OCP), and thermal shutdown. The IC is packaged in 18-lead QFN.