NCP3235 Datasheet, PDF (1/16 Pages) ON Semiconductor – High Current Synchronous Buck Converter

NCP3235
High Current Synchronous
Buck Converter
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
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
© Semiconductor Components Industries, LLC, 2016
May, 2016 − Rev. 0
(Top View)
ORDERING INFORMATION
Device
Package
NCP3235MNTXG 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