NCP51145PDR2G datasheet(1/6 Pages) ONSEMI

Part #	NCP51145PDR2G

Description	DDR 1.8 Amp Source Termination Regulator

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Manufacturer	ONSEMI [ON Semiconductor]

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April, 2017 − Rev. 3

1

Publication Order Number:

NCP51145/D

NCP51145

DDR 1.8 Amp Source / Sink

VTT Termination Regulator

The NCP51145 is a linear regulator designed to supply a regulated

VTT termination voltage for DDR−II, DDR−III, LPDDR−III and

DDR−IV memory applications. The regulator is capable of actively

sourcing and sinking

±1.8 A peak currents while regulating an output

voltage to within

±20 mV. The output termination voltage is regulated

to track VDDQ / 2 by two external voltage divider resistors connected

to the PVCC, GND, and VREF pins.

The NCP51145 incorporates a high−speed differential amplifier to

provide ultra−fast response to line and load transients. Other features

include source/sink current limiting, soft−start and on−chip thermal

shutdown protection.

Features

• For DDR VTT Applications, Source/Sink Currents:

• Supports DDR−II to ±1.8 A, DDR−III to ±1.5 A

• Supports LPDDR−III and DDR−IV to ±1.2 A

• Stable Using Ceramic−Only (Very Low ESR) Capacitors

• Integrated Power MOSFETs

• High Accuracy VTT Output at Full−Load

• Fast Transient Response

• Built−in Soft−Start

• Shutdown for Standby or Suspend Mode

• Integrated Thermal and Current−Limit Protection

• VTT Remote Sense Available in the DFN8 2x2mm Package

• These Devices are Pb−Free and are RoHS Compliant

Typical Applications

• DDR−II / DR−III / DDR−IV SDRAM Termination Voltage

• Motherboard, Notebook, and VGA Card Memory Termination

• Set Top Box, Digital TV, Printers

• Low Power DDR−3LP

MARKING

DIAGRAMS

www.onsemi.com

SOIC−8 EP

D SUFFIX

CASE 751BU

Device

Package

Shipping†

ORDERING INFORMATION

SOIC−8

(Pb−Free)

2500 / Tape &

Reel

NCP51145PDR2G

NC

VTT

18

NC

VREF

VCC

GND

NC

PVCC

PIN CONNECTIONS

1

8

1

8

51145

AYWW

G

51145

= Specific Device Code

XX

= Specific Device Code

M

= Date Code

A

= Assembly Location

Y

= Year

WW

= Work Week

G

= Pb−Free Package

SOIC−8 EP

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

DFN8

MN SUFFIX

CASE 506AA

1

XXM

G

1

(Note: Microdot may be in either location)

DFN−8

(Pb−Free)

3000 / Tape &

Reel

NCP51145MNTAG

DFN8 2x2, 0.5P

VREF

GND

18

NC

VTTS

VTT

PVCC

(Top Views)

VCC

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