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NCP3235 Dataheets PDF



Part Number NCP3235
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description High Current Synchronous Buck Converter
Datasheet NCP3235 DatasheetNCP3235 Datasheet (PDF)

NCP3235 Buck Converter - High Current, Synchronous The NCP3235 is a high current, high efficiency voltage mode synchronous buck converter which operates from 4.5 V to 23 V input and generates output voltages down to 0.6 V at up to 15 A continuous current. It has two operation modes: FCCM and automatic CCM/DCM. In automatic CCM/DCM mode, the controller can switch smoothly between CCM and DCM, where converter runs at reduced switching frequency to achieve much higher efficiency at light load. The.

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NCP3235 Buck Converter - High Current, Synchronous The NCP3235 is a high current, high efficiency voltage mode synchronous buck converter which operates from 4.5 V to 23 V input and generates output voltages down to 0.6 V at up to 15 A continuous current. It has two operation modes: FCCM and automatic CCM/DCM. In automatic CCM/DCM mode, the controller can switch smoothly between CCM and DCM, where converter runs at reduced switching frequency to achieve much higher efficiency at light load. The NCP3235 is available in 6 mm x 6 mm QFN−40 pin package. Features • Wide Input Voltage Range from 4.5 V to 23 V • 0.6 V Internal Reference Voltage • Switching Frequency Option: 550 kHz, 1.1 MHz • External Programmable Soft−Start • Lossless Low−side FET Current Sensing • Output Over−voltage Protection and Under−voltage Protection • Selective Hiccup/Latch Off Operation for All Faults • Pre−bias Start−up • Adjustable Output Voltage • Power Good Output • Internal Over−temperature Protection • Adjustable Input UVLO • This is a Pb−Free Device Typical Application • Industry PC Equipment • ASIC, FPGA, DSP and CPU Core and I/O Supplies • Server and Storage System • Telecom and Network Equipment www.onsemi.com 1 40 QFN40 6x6, 0.5P CASE 485CM MARKING DIAGRAM 1 NCP3235 AWLYYWWG A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package PIN CONNECTIONS SS 1 FB 2 COMP 3 ISET 4 AGND 5 MODE 6 PG 7 VIN 8 VIN 9 VIN 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 AGND 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 © Semiconductor Components Industries, LLC, 2016 August, 2019 − Rev. 1 (Top View) ORDERING INFORMATION Device NCP3235MNTXG Package QFN−40 (Pb−Free) Shipping† 2500 / 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. 1 Publication Order Number: NCP3235/D VCC VB COMP FB LDO VB OSC VREF VB E/A SS Soft Start VCC 2 mA EN 1.2V PG VB Enable Logic POR NCP3235 VCC VB Control Logic Ramp Generator PWM Logic −and− UVLO OVP, UVP Power Good OCP, TSD Protection VB VB Mode Selection BST VIN VSWH VSW PGND MODE AGND ISET Figure 1. NCP3235 Block Diagram Table 1. PIN DESCRIPTION Pin No. Symbol Description 1 SS A capacitor from this pin to GND allows the user to adjust the soft−start ramp time. 2 FB Output voltage feedback. 3 COMP Output of the error amplifier. 4 ISET A resistor from this pin to ground sets the over−current protection (OCP) threshold. 5, 37 AGND Analog ground. 6 MODE Mode selection for FCCM mode and automatic CCM/DCM mode, switching frequency and hiccup/latch pro- tection mode. See table I in the latter page. 7 PG Power good indicator of the output voltage. Open−drain output. Connect PG to VDD with an e.


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