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.

  • DDR−II / DR−III / DDR−IV SDRAM Termination Voltage
  • Low Power DDR−3LP
  • Motherboard, Notebook, and VGA Card Memory Termination
  • Set Top Box, Digital TV, Printers
  • 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

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Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

DDR Memory Type

IOUT VTT Max (A)

IQ Typ (µA)

VCC Bias Min (V)

VCC Bias Max (V)

Remote Sense

Power Good

Reference Price

NCP51145MNTAG

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Obsolete

CAD Model

Pb

A

H

P

DFN-8

1

260

REEL

3000

N

DDR4

1.8

1000

4.75

5.25

No

No

Price N/A

More Details

NCP51145PDR2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8 NB EP

2

260

REEL

2500

N

DDR3L

1.8

1000

4.75

5.25

No

No

Price N/A

More Details

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