NCP51145

1.8A Source / Sink VTT DDR Termination Regulator

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Overview

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 connectedto 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.

Applications

DDR−II / DR−III / DDR−IV SDRAM Termination Voltage
Low Power DDR−3LP

End Products

Motherboard, Notebook, and VGA Card Memory Termination
Set Top Box, Digital TV, Printers

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

Material Composition

Product Change Notification

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CAD Models

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

DDR Memory Type

I_OUT V_TT Max (A)

I_Q Typ (µA)

V_CC Bias Min (V)

V_CC Bias Max (V)

Remote Sense

Power Good

Pricing ($/Unit)

NCP51145PDR2G

Last Shipments

SOIC-8 NB EP

751BU

260

REEL

2500

DDR4

1.8

1000

4.75

5.25

Price N/A

NCP51145MNTAG

Last Shipments

DFN-8

506AA

260

REEL

3000

DDR4

1.8

1000

4.75

5.25

Price N/A

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DDR Termination Regulators | NCP51145

1.8A Source / Sink VTT DDR Termination Regulator

Overview

Availability & Samples (size)

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