NCP81174N 4/3/2-Phase Synchronous Buck Controller with Power Saving Mode and PWM VID Interface www.onsemi.com The NCP81174N is a generalpurpose multiphase 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 1 32 singlephase diode emulation mode to obtain high efficiency in light QFN32 load. Dualedge current mode multiphase PWM modulation ensures a MN SUFFIX fast transient response with minimum possible capacitors. CASE 488AM Features MARKING DIAGRAM Output Voltage up to 2.0 V with PWM VID Interface Support 1.8 V VID Interface 1 Remote Differential Output Voltage Sense 81174N AWLYYWW Differential Current Sense for Each Phase 200 kHz 1000 kHz Switching Frequency PWMVID Frequency up to 5 MHz A = Assembly Location Power Saving Interface (PSI) WL = Wafer Lot Power Good Output YY = Year WW = Work Week Thermally Compensated Current Monitoring = PbFree Package Over Current Protection (Note: Microdot may be in either location) Fast Transient Response Latched OVP and UVP Protections QFN32, 5 x 5 mm, 0.5 mm Pitch Package ORDERING INFORMATION This is a PbFree Device Device Package Shipping NCP81174NMNTXG QFN32 2500 / Tape & Typical Applications (PbFree) Reel GPU and CPU Power For information on tape and reel specifications, Graphics Card Applications including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: March, 2016 Rev. 0 NCP81174N/DNCP81174N 32 31 30 29 28 27 26 25 24 1 CS4 VIDBUF 2 23 CS4N VID 3 22 VR RDY CS3 NCP81174N EN 4 21 CS3N Top View (not to scale) PSI 5 20 CS2 19 VINMON 6 CS2N ROSC 7 18 CS1 FLAG/GND (Pin 33) ILIM 8 17 CS1N 10 11 12 13 14 15 16 9 Figure 1. Pinout www.onsemi.com 2 VSP REFIN VREF VSN VCC DIFFOUT DRVON COMP G4 VFB G3 VDRP G2 VDFB G1 CSSUM