NCP51145MNTAG Description

The NCP51145MNTAG 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 NCP51145MNTAG incorporates a high?speed differential amplifier to provide an ultra?fast response to line and load transients. Other features include source/sink current limiting, soft?start, and on?chip thermal shutdown protection.

NCP51145MNTAG 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

NCP51145MNTAG 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