NCP81038MNTWG Datasheet, PDF (1/11 Pages) ON Semiconductor – Synchronous Buck Controller with Auto Power Saving

NCP5228
Advance Information
Synchronous Buck Controller
with Auto Power Saving
Mode and Built-In LDO
NCP5228 is a dual synchronous buck controller that is optimized for
converting the battery voltage or adaptor voltage into multiple power
rails required in desktop and notebook system. NCP5228 consists of
two buck switching controllers with fixed 5.0 V output on channel 2,
3.3 V on channel 1 and two on−board LDOs with three outputs: 5 V /
60 mA and 3.3 V or 12 V / 10 mA. NCP5228 supports high efficiency,
fast transient response and provides power good signals. ON
Semiconductor proprietary adaptive−ripple control enables seamless
transition from CCM to DCM, where converter runs at reduced
switching frequency with much higher efficiency at light load. The
part operates with supply voltage ranging from 5.5 V to 28 V.
NCP5228 is available in a 28−pin QFN package.
Features
• Wide Input Voltage Range: from 5.5 V to 28 V
• Built−in 5 V / 60 mA LDO
• Built−in selectable 3.3 V or 12 V / 10 mA LDO
• Three Selectable Fixed Frequency 300 KHz, 400 KHz or 600 KHz
• 180 Interleaved Operation Between the Two Channels in
Continue−Conduction−Mode (CCM)
• Selected Power−Saving Mode/Forced PWM Mode
• Transient−Response−Enhancement (TRE) Control
• Input Supply Voltage Feed Forward Control
• Resistive or Lossless Inductor’s DCR Current Sensing
• Over−Temperature Protection
• Internal Fixed 13 ms Soft−Start
• Fixed Output Voltages 5 V and 3.3 V
• Power Good Outputs for Both Channels
• Built−in Adaptive Gate Drivers
• Output Discharge Operation
• Built−in Over−Voltage, Under−Voltage Protection
• Accurate Over−Current Protection
• Thermal Shutdown
• This is a Pb−Free Device
Applications
• Desktop / Notebook Computers
• System Power Supplies
• I/O Power Supplies
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
http://onsemi.com
1
28 PIN QFN, 4x4
MN SUFFIX
CASE 485AR
MARKING
DIAGRAM
NCP5228
ALYWG
G
NCP5228 = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
28
1
GH2
BST2
SWN2
GL2
PGND2
CSP2
CSN2
GND
GH1
BST1
SWN1
GL1/FSET
PGND1
CSP1
CSN1
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5228MNTWG
QFN−28
(Pb−Free)
4,000 /
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, 2013
1
October, 2013 − Rev. P6
Publication Order Number:
NCP5228/D