NCP51145 Datasheet, PDF (1/6 Pages) ON Semiconductor – DDR 1.8 Amp Source / Sink Termination Regulator

NCP51145
DDR 1.8 Amp Source / Sink
V_TT Termination Regulator
The NCP51145 is a linear regulator designed to supply a regulated
V_TT 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 V_DDQ / 2 by two external voltage divider resistors connected
to the PV_CC, GND, and V_REF 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 V_TT 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 V_TT Output at Full−Load
• Fast Transient Response
• Built−in Soft−Start
• Shutdown for Standby or Suspend Mode
• Integrated Thermal and Current−Limit Protection
• V_TT 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
www.onsemi.com
MARKING
DIAGRAMS
8
8
1
SOIC−8 EP
D SUFFIX
CASE 751BU
51145
AYWWG
G
1
DFN8
MN SUFFIX
CASE 506AA
1
XXMG
G
1
51145
XX
M
A
Y
WW
G
= Specific Device Code
= Specific Device Code
= Date Code
= Assembly Location
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
1
8
1
8
PVCC
NC ^PVCC
V_CC
GND
NC
VREF
V_CC
V_{TT SOIC−8 EP} NC
V_TT
NC
GND
NC
V_TTS
VREF
DFN8 2x2, 0.5P
(Top Views)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP51145PDR2G SOIC−8 2500 / Tape &
(Pb−Free)
Reel
NCP51145MNTAG DFN−8 3000 / Tape &
(Pb−Free)
Reel
†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.
© Semiconductor Components Industries, LLC, 2015
1
June, 2015 − Rev. 2
Publication Order Number:
NCP51145/D