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reference designNCP81174

Onsemi NCP81174

Multi-Phase Synchronous Buck Controller with Power Saving Mode and PWM VID Interface

Overview

TopologyOther Topology
Switching frequency200-1000 kHz
IC revision5

Description

The NCP81174 is a general−purpose up to four−phase synchronousbuck controller. It combines differential voltage sensing, differentialphase current sensing, and PWM VID interface to provide accurateregulated power for the computer or graphic controllers. It canreceive power saving command (PSI) from processors and operates insingle−phase diode emulation mode to obtain high efficiency in lightload. Dual−edge multiphase PWM modulation ensures a fast transientresponse 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 VCC 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

  • Graphics Card Applications
  • GPU and CPU Power
  • Desktop and Notebook Applications

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT(A)
RDC(mΩ)
fres(MHz)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
Material
Qty.
SamplesAvailability & Sample
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744314047
SPECWE-HCI SMT Flat Wire High Current Inductor, 0.47 µH, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance0.47 µH
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–
DC Resistance1.35 mΩ
Self Resonant Frequency235 MHz
Performance Rated Current31.9 A
Saturation Current @ 10%9 A
Saturation Current @ 30%20 A
MaterialSuperflux 
Packaging Unit1000 
–Check availability
74404064010
SPECWE-LQS SMT Power Inductor, 1 µH, 5.9 A
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LQS SMT Power Inductor
Inductance1 µH
Rated Current5.9 A
Saturation Current11.5 A
DC Resistance11 mΩ
Self Resonant Frequency159 MHz
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–
–
–
Packaging Unit1500 
–Check availability