NCP3233

NCP3233 Buck Converter - High Current, Synchronous The NCP3233 is a high current, high efficiency voltage−mode synchronous buck controller which operates from 3.0 V to 21 V input and generates output voltages down to 0.6 V at up to 20 A. Features Wide Input Voltage Range from 3.0 V to 21 V 0.6 V 1% Accurate Internal Reference Over Temperature Fixed Switching Frequency: 500 kHz (1 MHz and 300 kHz options contact factory) External Programmable Soft−Start Lossless Low−side and High−side FET Current Sensing Output Overvoltage Protection and Undervoltage Protection Recoverable Overvoltage Protection Hiccup Mode Operation for UVP, LS OCP and TSD Pre−bias Start−up Adjustable Output Voltage Power Good Output Internal Overtemperature Protection Adjustable Input UVLO This is a Pb−Free Device Typical Application 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 485AZ MARKING DIAGRAM 1 NCP3233 AWLYYWWG A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package PIN CONNECTIONS VIN VIN VIN EN SS GND COMP FB VB ISET 1 2 3 4 5 6 7 8 9 10 VIN 11 VIN 12 VIN 13 VIN 14 VSW 15 PGND 16 PGND 17 PGND 18 PGND 19 PGND 20 VIN EP42 GND EP41 VSW EP43 40 VCC 39 XCP 38 VINX 37 GND 36 PG 35 BST 34 VSW 33 VSW 32 VSW 31 VSW PGND 21 PGND 22 PGND 23 PGND 24 PGND 25 PGND 26 PGND 27 PGND 28 VSW 29 VSW 30 (Top View) ORDERING IN...