NCP3231 Datasheet, PDF (1/15 Pages) ON Semiconductor – High Current Synchronous Buck Converter

NCP3231
High Current Synchronous
Buck Converter
The NCP3231 is a high current, high efficiency, voltage−feed−
forward 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 DC load or 30 A instantaneous load.
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 485CM
MARKING
DIAGRAM
1
NCP3231
AWLYYWWG
NCP3231
A
WL
YY
WW
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
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
(TOP VIEW)
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
ORDERING INFORMATION
Device
Package
NCP3231MNTXG 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.
© Semiconductor Components Industries, LLC, 2015
1
May, 2015 − Rev. 5
Publication Order Number:
NCP3231/D