1 2 3 4 5 6 7 8 9 10 Buck Converter - High Current, Synchronous NCP3232N The NCP3232N is a high current, high efficiency voltagemode synchronous buck converter which operates from 4.5 V to 21 V input and generates output voltages down to 0.6 V at up to 15 A. www.onsemi.com Features Wide Input Voltage Range from 4.5 V to 21 V 0.6 V Internal Reference Voltage MARKING DIAGRAM 500 kHz Switching Frequency External Programmable SoftStart 1 Lossless Lowside FET Current Sensing 1 40 NCP3232N AWLYYWWG Output Overvoltage Protection and Undervoltage Protection QFN40 6x6, 0.5P CASE 485CM System Overtemperature Protection using a Thermistor or Sensor Hiccup Mode Operation for all Faults A = Assembly Location Prebias Startup WL = Wafer Lot Adjustable Output Voltage YY = Year Power Good Output WW = Work Week G = PbFree Package Internal Overtemperature Protection These Devices are PbFree and are RoHS Compliant* PIN CONNECTIONS Typical Application Cellular Base Stations ASIC, FPGA, DSP and CPU Core and I/O Supplies VIN EN 11 40 Telecom and Network Equipment VIN VCC 12 39 VIN GND Server and Storage System EP42 EP41 VIN 13 38 VB VIN 14 37 PGND VSWH 15 36 BST PGND 16 35 VSW PGND 17 34 VSWH VSWH EP43 PGND 18 33 VSWH PGND 19 32 VSWH 20 31 PGND VSWH (TOP VIEW) ORDERING INFORMATION Device Package Shipping NCP3232NMNTXG QFN40 2500 / (PbFree) 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. *For additional information on our PbFree strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: May, 2021 Rev. 9 NCP3232N/D PGND VIN 21 PGND VIN 22 VIN PGND 23 PGND PG 24 PGND 25 OTS AGND PGND 26 PGND 27 ISET PGND 28 COMP 29 FB VSWH 30 VSWH SSNCP3232N VB VCC VB LDO VCC VB VB BST VIN OSC COMP VB Control Logic VREF + Ramp Generator E/A PWM Logic FB and VSWH UVLO VSW Soft Start SS OVP, UVP Power Good VCC OCP, TSD VB VB 2 A Protection EN Enable Logic 1.2 V POR PGND PG VB VREF + OTS AGND ISET Figure 1. NCP3232N Block Diagram www.onsemi.com 2