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NCP81274MNTXG Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP81274MNTXG Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 26 page  © Semiconductor Components Industries, LLC, 2017 June, 2017 − Rev. 14 1 Publication Order Number: NCP81274/D NCP81274 8/7/6/5/4/3/2/1 Phase Buck Controller with PWM_VID and I2C Interface The NCP81274 is a multiphase synchronous controller optimized for new generation computing and graphics processors. The device is capable of driving up to 8 phases and incorporates differential voltage and phase current sensing, adaptive voltage positioning and PWM_VID interface to provide and accurately regulated power for computer or graphic controllers. The integrated power saving interface (PSI) allows for the processors to set the controller in one of three modes, i.e. all phases on, dynamic phases shedding or fixed low phase count mode, to obtain high efficiency in light-load conditions. The dual edge PWM multiphase architecture ensures fast transient response and good dynamic current balance. Features • Compliant with NVIDIA® OVR4+ Specifications • Supports Up to 8 Phases • 4.5 V to 20 V Supply Voltage Range • 250 kHz to 1.2 MHz Switching Frequency (8 Phase) • Power Good Output • Under Voltage Protection (UVP) • Over Voltage Protection (OVP) • Over Current Protection (OCP) • Per Phase Over Current Protection • Startup into Pre-Charged Loads while Avoiding False OVP • Configurable Adaptive Voltage Positioning (AVP) • High Performance Operational Error Amplifier • True Differential Current Balancing Sense Amplifiers for Each Phase • Phase-to-Phase Dynamic Current Balancing • Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading • Power Saving Interface (PSI) • Automatic Phase Shedding with User Settable Thresholds • PWM_VID and I2C Control Interface • Compact 40 Pin QFN Package (5 × 5 mm Body, 0.4 mm Pitch) • This Device is Pb-Free and is RoHS Compliant Typical Applications • GPU and CPU Power • Graphic Cards • Desktop and Notebook Applications MARKING DIAGRAM QFN40 CASE 485CR www.onsemi.com 40 1 NCP 81274 AWLYYWW G G 1 NCP81274 = Specific Device Code A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb-Free Package (Note: Microdot may be in either location) ON PIN CONNECTIONS 1 2 3 4 5 6 7 8 9 10 30 29 28 27 26 25 24 23 22 21 REFIN VREF VRMP PWM8/SS PWM7/OCP PWM6/LPC1 PWM5/LPC2 PWM4/PHTH1 PWM3/PHTH2 PWM2/PHTH3 COMP FB DIFF FSW LLTH/I2C_ADD IOUT ILIM CSCOMP CSSUM CSREF NCP81274 (TOP VIEW) Tab: GROUND Device Package Shipping† ORDERING INFORMATION NCP81274MNTXG QFN40 (Pb-Free) 5000/Tape & Reel †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. |
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