NCP51145 Datasheet - ON Semiconductor

NCP51145 - Termination Regulator

Pin No.

SO8 *EP Pin No.

DFN8 Pin Name 1 1 PVCC 2 4 GND 3 5 VREF 4 2 VTT 5, 7, 8 6 3, 7 8 NC VCC * 6 VTTS EP EP EPAD Description Input voltage which supplies current to the output pin.

CIN ^ ½ S COUT Common Ground Buffered reference voltage input equal to ½ of VDDQ and activ

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

NCP51145 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