© Semiconductor Components Industries, LLC, 2015
March, 2015 − Rev. 5
1 Publication Order Number:
NCP81174/D
NCP81174
4/3/2-Phase Synchronous
Buck Controller with Power
Saving Mode and PWM VID
Interface
The NCP81174 is a general−purpose up to four−phase synchronous
buck controller. It combines differential voltage sensing, differential
phase current sensing, and PWM VID interface to provide accurate
regulated power for the computer or graphic controllers. It can
receive power saving command (PSI) from processors and operates in
single−phase diode emulation mode to obtain high efficiency in light
load. Dual−edge multiphase PWM modulation ensures a fast transient
response with minimum possible capacitors.
Features
• Output Voltage up to 2.0 V with PWM VID Interface
• Support 1.8 V and 3.3 V VID interface
• Remote Differential Output Voltage Sense
• Differential Current Sense For Each Phase
• 200 kHz − 1000 kHz Switching Frequency
• Power Saving Interface (PSI)
• Power Good Output
• Thermally Compensated Current Monitoring
• Over Current Protection
• Fast Transient Response
• 5 V V
CC
Shunt Regulator
• Latched OVP and UVP Protections
• QFN−32, 5 x 5 mm, 0.5 mm Pitch Package
• This is a Pb−Free Device
Typical Applications
• GPU and CPU Power
• Graphics Card Applications
• Desktop and Notebook Applications
Device Package Shipping
†
ORDERING INFORMATION
NCP81174MNTXG QFN32
(Pb−Free)
2500 / Tape &
Reel
QFN32
MW SUFFIX
CASE 488AM
MARKING DIAGRAM
www.onsemi.com
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
(Note: Microdot may be in either location)
32
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NCP81174
AWLYYWWG
G
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