NCP5214 datasheet(1/14 Pages) ONSEMI

Part #	NCP5214

Description	2-in-1 Notebook DDR Power Controller

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April, 2005 − Rev. P0

1

Publication Order Number:

NCP5214/D

NCP5214

Product Preview

2−in−1 Notebook DDR

Power Controller

The NCP5214 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 DFN−22.

Features

• Incorporates VDDQ, VTT Regulator, Buffered VREF

• Adjustable VDDQ Output

• VTT and VREF Track VDDQ/2

• Operates from Single 5.0 V Supply

• Supports VDDQ Conversion Rails from 5.0 V to 24 V

• Power−saving Mode for High Efficiency at Light Load

• Integrated Power FETs with VTT Regulator Sourcing/Sinking 1.5 A

DC and 2.4 A Peak Current

• Buffered Low Noise 15 mA VREF Output

• All External Power MOSFETs are N−channel

• <5.0 mA Current Consumption During Shutdown

• Fixed Switching Frequency of 400 kHz

• Soft−start Protection for VDDQ and VTT

• Undervoltage Monitor of Supply Voltage

• Overvoltage Protection and Undervoltage Protection for VDDQ

• Short−circuit Protection for VDDQ and VTT

• Thermal Shutdown

• Housed in DFN−22

Typical Applications

• Notebook DDR/DDR2 Memory Supply and Termination Voltage

• Active Termination Busses (SSTL−18, SSTL−2, SSTL−3)

This document contains information on a product under development. ON Semiconductor

reserves the right to change or discontinue this product without notice.

DFN−22

MN SUFFIX

CASE 506AF

PIN CONNECTIONS

Device

Package

Shipping†

ORDERING INFORMATION

NCP5214MNR2

DFN−22

2500 Tape & Reel

NCP5214 = Specific Device Code

A

= Assembly Location

WL

= Wafer Lot

YY

= Year

WW

= Work Week

MARKING

DIAGRAM

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

http://onsemi.com

VDDQEN

VTTEN

FPWM

SS

VTTGND

VTT

VTTI

FBVTT

AGND

DDQREF

VCCA

PGND

BGDDQ

VCCP

SWDDQ

TGDDQ

BOOST

OCDDQ

PGOOD

VTTREF

FBDDQ

COMP

(Top View)

NOTE: Pin 23 is the thermal pad on

the bottom of the device.

NCP5214

AWLYYWW

1

22

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