NCP3232NMNTXG

Buck Converter - High Current, Synchronous NCP3232N The NCP3232N is a high current, high efficiency voltage−mode 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 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 These Devices are Pb−Free and are RoHS Compliant* MARKING DIAGRAM 1 1 40 A WL YY WW G = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package SS ISET FB AGND COMP OTS VIN PG VIN 4 1 5 3 6 2 8 9 7 10 VIN 11 VIN 12 VIN 13 VIN 14 37 PGND VSWH 15 36 BST PGND 16 PGND 17 PGND 18 PGND 19 32 VSWH PGND 20 31 VSWH 40 EN VIN EP42 39 VCC GND EP41 38 VB 35 VSW 34 VSWH 27 28 29 PGND PGND VSWH 30 26 PGND VSWH 25 23 PGND PGND 22 33 VSWH 24 21 PGND VSWH EP43 PGND Cellular Base Stations ASIC, FPGA, DSP and CPU Core and I/O Supplies Telecom and Network Equipment Server and Storage System VIN PIN CONNECTIONS Typical Application • • • • NCP3232N AWLYYWWG QFN40 6x6, 0.5P CASE 485CM PGND • • • • • • • • • • • • • (TOP VIEW) ORDERING INFORMATION Device Package Shipping† NCP3232NMNTXG QFN−40 (Pb−Free) 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. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. © Semiconductor Components Industries, LLC, 2015 May, 2021 − Rev. 9 1 Publication Order Number: NCP3232N/D NCP3232N VB LDO VCC VCC VB VB VB BST VIN OSC COMP VREF FB VB Control Logic Ramp Generator PWM Logic + E/A − − and − SS Soft Start VCC 2 mA EN VB VSWH UVLO OVP, UVP Power Good OCP, TSD Protection VSW VB Enable Logic 1.2 V POR PGND PG VB + − VREF OTS ISET AGND Figure 1. NCP3232N Block Diagram www.onsemi.com 2 NCP3232N PIN DESCRIPTION Pin No. Symbol 1 SS A capacitor from this pin to GND allows the user to adjust the soft−start ramp time. Description 2 FB Output voltage feedback. 3 COMP 4 ISET 5 AGND 6 OTS 7 PG Power good indicator of the output voltage. Open−drain output. Connect PG to VDD with an external resistor. 8−14, EP42 VIN The VIN pin is connected to the internal power NMOS switch. The VIN pin has high di/dt edges and must be decoupled to ground close to the pin of the device. 15, 29−34, EP43 VSWH The VSWH pin is the connection of the drain and source of the internal NMOS switches. At switch off, the inductor will drive this pin below ground as the body diode and the NMOS conducts with a high dv/dt. 16−28, 37 PGND Ground reference and high−current return path for the bottom gate driver and low- side NMOS 35 VSW IC connection to the switch node between the top MOSFET and bottom MOSFET. Return path of the high−side gate driver. 36 BST Top gate driver input supply, a bootstrap capacitor connection between SWN and this pin. 38 VB 39 VCC 40 EN EP41 GND Output of the error amplifier. A resistor from this pin to ground sets the over−current protection (OCP) threshold. Analog ground. Negative input of internal thermal comparator. Tie this pin to ground if not in use. The internal LDO output and input supply for the charge pump. Connect a minimum of 4.7uF ceramic capacitor from this pin to ground. Input Supply for IC. This pin must be connected to VIN. Logic control for enabling the switcher. An internal pull−up enables the device automatically. The EN pin can also be driven high to turn on the device, or low to turn off the device. A comparator and precision reference allow the user to implement this pin as an adjustable UVLO circuit. Exposed Pad. Connect GND to a large copper plane at ground potential to improve thermal dissipation. www.onsemi.com 3 NCP3232N VIN VIN BST VCC VOUT VSWH VSW VB PGND NCP3232N ISET AGND VPG EN FB OTS PG COMP SS 1 MW Figure 2. Typical Application Circuit ABSOLUTE MAXIMUM RATINGS (measured vs. GND pad, unless otherwise noted) Symbol Rating Power Supply to GND Value Unit VIN, VCC −0.3 to 23 V VSW to GND VSWH, VSW −0.6 to 30 (DC) −5(t