NCP3231A

Buck Converter - High Current, Synchronous NCP3231A The NCP3231A is a high current, high efficiency, voltage−mode synchronous buck converter which operates from 4.5 V to 18 V input and generates output voltages down to 0.6 V at up to 25 A. Features Wide Input Voltage Range from 4.5 V to 18 V 0.6 V Internal Reference Voltage 500 kHz Switching Frequency External Programmable Soft−start Lossless Low−side FET Current Sensing Output Over−voltage Protection and Under−voltage Protection System Over−temperature Protection using a Thermistor or Sensor Hiccup Mode Operation for All Faults Pre−bias Start−up Adjustable Output Voltage Power Good Output Internal Over−temperature Protection This is a Pb−Free Device* Typical Applications Cellular Base Stations ASIC, FPGA, DSP and CPU Core and I/O Supplies Telecom and Network Equipment Server and Storage System www.onsemi.com 1 40 QFN40 6x6, 0.5P CASE 485FJ MARKING DIAGRAM 1 NCP3231A AWLYYWWG NCP3231A = Specific Device Code A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package PIN CONNECTIONS VIN VIN VIN PG OTS AGND ISET COMP FB SS 1 2 3 4 5 6 7 8 9 10 VIN 11 VIN 12 VIN 13 VIN 14 VSWH 15 PGND 16 PGND 17 PGND 18 PGND 19 PGND 20 VIN EP42 GND EP41 VSWH EP43 40 EN 39 VCC 38 VB 37 PGND 36 BST 35 VSW 34 VSWH 33 VSWH 32 VSWH 31 VSWH PGND 21 PGND 22 PGND 23 PGND 24 PGND 25 PGND 26 PGND 27 PGND 28 VSWH 29 VSWH 30 *For additional information on our Pb−Free strategy and solderin...