8/7/6/5/4/3/2/1 Multi-Phase Buck Controller with 2 PWM VID and I C Interface NCP81610 Description The NCP81610 is a multiphase synchronous controller optimized www.onsemi.com 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 1 40 interface (PSI) allows for the processors to set the controller in one of QFN40 5x5, 0.4P three modes, i.e. all phases on, dynamic phases shedding or fixed low CASE 485CR phase count mode, to obtain high efficiency in lightload conditions. The dual edge PWM multiphase architecture ensures fast transient MARKING DIAGRAM response and good dynamic current balance. 1 Features NCP81610 Compliant with NVIDIA OVR4i+ Specifications AWLYYWW Supports up to 8 Phases 2.8 V to 20 V Supply Voltage Range: 250 kHz to 1.2 MHz Switching Frequency (8 Phase) NCP81610 = Device Code A = Assembly Site Power Good Output WL = Wafer Lot Number Under Voltage Protection (UVP) YY = Year of Production, Last Two Numbers WW = Work Week Number Over Voltage Protection (OVP) Per Phase Over Current Limiting (OCL) System Over Current Protection (OCP) PIN CONNECTIONS Startup into PreCharged Loads while Avoiding False OVP Configurable Load Line High Performance Operational Error Amplifier True Differential Current Balancing Sense Amplifiers for Each Phase PhasetoPhase 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 2 PWM VID and I C Control Interface Compact 40 Pin QFN Package (5 x 5 mm Body, 0.4 mm Pitch) These Devices are PbFree and are RoHS Compliant Typical Applications ORDERING INFORMATION GPU and CPU Power Graphic Cards Device Package Shipping Desktop and Notebook Applications NCP81610MNTXG QFN40 5000 / Tape (PbFree) & Reel Docking Stations For information on tape and reel specifications, Power Banks including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: July, 2020 Rev. 5 NCP81610/DNCP81610 . Figure 1. Typical Controller Application Circuit www.onsemi.com 2 J2 TP46 TP47 TP45 TP48 TP49 TP50 TP51 VCC DUT VSN sense 2 1 R128 4 3 1 2 ILIM 6 5 J4 R38 EN 8 7 SDA 10 9 12 11 SCL C5 14 13 SDA J3 C17 16 15 PSI SCL 18 17 EN R130 20 19 1 2 R129 1 2 J1 PGOOD 1 4 2 C2 TP1 R37 VSP sense 1 2 1 2 TP52 TP53 TP54 TP36 TP44 TP37 R16 R21 REFIN C18 TP42 C15 R43 R49 U1 2 1 21 2 1 2 1 2 12 1 R9 TP38 1 2 TP43 C3 VIN 1 2 TP39 C16 R48 TP55 TP56 TP57 TP58 TP59 1 30 C4 1 2 2 1 2 1 REFIN COMP TP41 C1 2 29 VREF FB TP40 VREF 3 28 VRAMP DIFF 4 27 PWM8/SS FSW PWM8 5 26 NCP81610 PWM7 PWM7/I2C TMON 6 25 PWM6/LPC1 IOUT PWM6 7 24 ILIM PWM5 PWM5/LPC2 ILIM 8 23 PWM4/PHTH1 CSCOMP PWM4 9 22 PWM3 PWM3/PHTH2 CSSUM 10 21 PWM2/PHTH3 CSREF PWM2 PWM1 41 C13 PAD R18 R22 R14 TP62 R7 R10 R2 R4 R13 TP60 DRON TP61 2 1 R30 2 1 R29 2 1 R31 2 1 R33 2 1 R34 2 1 R35 2 1 R36 2 1 R32 3 5 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 R25 1 2 R28 1 2 11 40 PWM1/PHTH4 VID BUFF 12 39 DRON PWM VID 13 38 ISNS8 CSP8 PGOOD 14 37 ISNS7 CSP7 PSI 15 36 ISNS6 CSP6 EN 16 35 ISNS5 CSP5 SCL 17 34 ISNS4 CSP4 SDA 18 33 1 2 ISNS3 CSP3 VCC 19 32 ISNS2 CSP2 VSN 20 31 ISNS1 CSP1 VSP 1 2 R150 2 1 Ext bias 2 1 R39 2 1 1 2 CSN8 R40 2 1 CSN7 R41 2 1 CSN6 R42 2 1 CSN5 R44 2 1 CSN4 R45 2 1 CSN3 R46 2 1 CSN2 R47 2 1 CSN1 R51 2 1 2 1 C19 R127 2 1 R142 2 1 TMON8 R143 2 1 R126 TMON7 R55 2 1 2 1 R144 2 1 2 1 TMON6 R145 2 1 C185 2 1 TMON5 R146 2 1 TMON4 C21 R147 2 1 TMON3 R148 2 1 R124 TMON2 R56 2 1 2 1 R149 2 1 TMON1 R57 R125 2 1 2 1