NCP81231 High Resolution Buck Controller with Full USB PD Features and 100% Duty Operation www.onsemi.com The NCP81231 is a synchronous buck that is optimized for converting battery voltage or adaptor voltage into power supply rails required in notebook, tablet, and desktop systems, as well as many other consumer devices using USB PD standard and C Type cables. The NCP81231 is fully compliant to the USB Power Delivery 1 32 Specification when used in conjunction with a USB PD or CType Interface Controller. NCP81231 is designed for applications requiring QFN32 5x5, 0.5P CASE 485CE dynamically controlled slew rate limited output voltage. Features MARKING DIAGRAM Wide Input Voltage Range: from 4.5 V to 28 V Dynamically Programmed Frequency from 150 kHz to 1.2 MHz 1 2 I C Interface NCP81231 AWLYYWW Real Time Power Good Indication Controlled Slew Rate Voltage Transitioning Feedback Pin with Internally Programmed Reference A = Assembly Location High Resolution DAC Voltage WL = Wafer Lot Two Independent Current Sensing Inputs YY = Year WW = Work Week Support Inductor DCR Sensing = PbFree Package Over Temperature Protection (Note: Microdot may be in either location) Adaptive NonOverlap Gate Drivers Filter Capacitor Switch Control ORDERING INFORMATION 100% Duty Cycle Operation Latched OverVoltage and OverCurrent Protection Device Package Shipping Dead Battery Power Support NCP81231MNTXG QFN32 2500 / Tape (PbFree) & Reel 5 x 5 mm QFN32 Package For information on tape and reel specifications, Typical Application including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Notebooks, Tablets, Desktops Brochure, BRD8011/D. Gaming Monitors, TVs, and Set Top Boxes Consumer Electronics Car Chargers Docking Stations Power Banks Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: May, 2018 Rev. 3 NCP81231/DNCP81231 V1 V2 V1 DBIN CSP1 DBOUT CSN1 Q6 VDRV VBUS C VDRV FB R DRV RPU CSN2 CO1 CO2 VCC CVCC RPD CSP2 Q5 Current Sense 1 CS 1 CFET1 RCS 1 Current Sense 2 CS 2 BST 1 R CS 2 Q1 CB1 Curret Limit Indicator CLIND HSG1 Interrupt INT VSW 1 Enable EN L1 SDA I2C SCL Q2 LSG1 PGND1 COMP RC CP AGND CC PDRV Figure 1. Typical Application Circuit (DCR) www.onsemi.com 2