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NCP81172 Dataheets PDF



Part Number NCP81172
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description 2-Phase Synchronous Buck Controller
Datasheet NCP81172 DatasheetNCP81172 Datasheet (PDF)

NCP81172 2-Phase Synchronous Buck Controller with Integrated Gate Drivers and PWM VID Interface The NCP81172, a general−purpose two−phase synchronous buck controller, integrates gate drivers and PWM VID interface in a QFN−24 package and provides a compact−footprint power management solution for new generation computing processors. It receives power save command (PSI) from processors and operates in 1−phase diode emulation mode to obtain high efficiency in light−load condition. Operating in high.

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NCP81172 2-Phase Synchronous Buck Controller with Integrated Gate Drivers and PWM VID Interface The NCP81172, a general−purpose two−phase synchronous buck controller, integrates gate drivers and PWM VID interface in a QFN−24 package and provides a compact−footprint power management solution for new generation computing processors. It receives power save command (PSI) from processors and operates in 1−phase diode emulation mode to obtain high efficiency in light−load condition. Operating in high switching frequency up to 800 kHz allows employing small size inductor and capacitors. The part is able to support all−ceramic−capacitor applications. Features  4.5 V to 24 V Input Voltage Range  Output Voltage up to 2.0 V with PWM VID Interface  Differential Output Voltage Sense  Integrated Gate Drivers  200 kHz ~ 800 kHz Switching Frequency  Power Saving Interface (PSI)  Power Good Output  Programmable Over Current Protection  Over Voltage Protection  Under Voltage Protection  Temperature Sense and Alert Output  Thermal Shutdown Protection  QFN−24, 4 x 4 mm, 0.5 mm Pitch Package  This is a Pb−Free Device Typical Applications  GPU and CPU Power  Graphics Card Applications  Desktop and Notebook Applications http://onsemi.com 1 24 QFN24 CASE 485L MARKING DIAGRAM 81172 ALYWG G 81172 A L Y W G = Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package PINOUT 18 17 16 15 14 13 BST2 HG2 PGOOD VCC TALERT# TSNS 19 PH2 20 LG2 21 PVCC 22 PGND 23 LG1 24 PH1 25 GND COMP 12 FB 11 FBRTN 10 FS 9 VREF 8 REFIN 7 BST1 HG1 EN PSI VID VIDBUF 123456 (Top View) ORDERING INFORMATION Device Package Shipping† NCP81172MNTXG QFN24 (Pb−Free) 4000 / 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.  Semiconductor Components Industries, LLC, 2013 April, 2013 − Rev. 1 1 Publication Order Number: NCP81172/D NCP81172 +5 V +3.3 V EN PSI PG TALT VID 15 VCC PVCC 21 25 GND PGND 22 3 EN 4 PSI 16 PGOOD 14 TALERT# NCP81172 5 VID 13 TSNS HG1 2 BST1 1 PH1 24 LG1 23 HG2 17 BST2 18 PH2 19 LG2 20 8 VREF 7 REFIN 6 VIDBUF 9 FS FBRTN 10 FB 11 COMP 12 +5 V VIN VIN Figure 1. Typical Application Circuit with PWM−VID Interface VOUT http://onsemi.com 2 NCP81172 +5 V +3.3 V EN PSI PG TALT 15 VCC PVCC 21 25 GND PGND 22 3 EN 4 PSI 16 PGOOD 14 TALERT# NCP81172 5 VID 13 TSNS HG1 2 BST1 1 PH1 24 LG1 23 HG2 17 BST2 18 PH2 19 LG2 20 8 VREF 7 REFIN 6 VIDBUF 9 FS FBRTN 10 FB 11 COMP 12 +5 V VIN VIN Figure 2. Typical Application Circuit without PWM−VID Interface VOUT http://onsemi.com 3 NCP81172 15 VCC 3 EN 16 PGOOD UVLO & PGOOD 13 TSNS Thermal 14 TALERT# Management FAULT PWM1 Gate Drive 1 4 PSI PSI Control 9 FS Ramp Generator VREF 8 Reference Voltage 5 VID 6 VIDBUF 7 REFIN 11 FB 10 FBRTN 25 GND 12 COMP RAMP1 PH1 RAMP2 2/1 Phase PWM Control & Protections (.


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