NCP81255MNTXG ON Semiconductor

NCP81255 SinglePhase Voltage Regulator with Intel Proprietary Interface for Computing Applications www.onsemi.com The NCP81255 is a high-performance, low-bias current, single-phase regulator with integrated power MOSFETs intended to support a wide range of computing applications. The device is able to deliver up to 14 A TDC output current on an adjustable output with Intel proprietary interface interface. Operating in high switching 1 40 frequency up to 1.2 MHz allows employing small size inductor and QFN40 capacitors. The controller makes use of ON Semiconductors patented CASE 485DY high performance RPM operation. RPM control maximizes transient response while allowing for smooth transitions between discontinuous-frequency-scaling operation and continuous-mode MARKING DIAGRAM full-power operation. The NCP81255 has an ultra-low offset current 1 monitor amplifier with programmable offset compensation for high-accuracy current monitoring. NCP81255 FAWLYYWW Features Auto DCM Operation in High Current Power States High Performance RPM Control System NCP81255 = Specific Device Code IMVP8 Intel proprietary interface Support F = Wafer Fab A = Assembly Location Ultra Low Offset IOUT Monitor WL = Lot ID Dynamic VID Feed-Forward YY = Year Programmable Droop Gain WW = Work Week = Pb-Free Package Zero Droop Capable Supports IMVP8 Intel proprietary interface Addresses PSYS Input Monitor ORDERING INFORMATION Thermal Monitor Device Package Shipping UltraSonic Operation NCP81255MNTXG QFN40 3000 / Tape & Reel Digitally Controlled Operating Frequency (PbFree) QFN40 5 mm 5 mm Package For information on tape and reel specifications, These Devices are PbFree, Halogen Free/BFR Free and are RoHS including part orientation and tape sizes, please Compliant refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Applications IMVP8 Rail1, Rail3, and Rail4 Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: November, 2016 Rev. 3 NCP81255/D + NCP81255 Figure 1. Block Diagram www.onsemi.com 2 VFF (Input Voltage Feed-Forward) EN C Fit OVP Comp UVP Clamp Monitor R VCC SENSE droop adj VSP COMP VSS SENSE VCC UVLO VSN R gm FF RPM Trigger & PWM PVCC Control Functions DAC C FF GND RPM Generator ALERT SCLK Intel SDIO propri- V VR HOT IN etary PVCC VR RDY inter- face TSENSE VBST Control PSYS TG ICCMAX ADC Gate SWN ADDR Driver VBOOT BG R CS SWN CS SENSE PGND CSP I OUT VSP C CS NTC Iout adj gm CS SENSE CSN R OFFSET ADJ ZCD Comparator Ilimit adj for PS2 Operation OFFSET Bias Current Generator V OCP REF DOSC PWM