NCP81278
Compact 2-Phase
Synchronous Buck
Controller with Integrated
Gate Drivers and PWM VID
Interface
The NCP81278, a general−purpose two−phase synchronous buck
controller, integrates gate drivers and PWM VID interface in a
QFN−20 package and provides a compact−footprint power
management solution for new generation computing processors. It has
a programmable power save interface (PSI) and is able to operate in
1−phase diode emulation mode to obtain high efficiency in light−load
condition. Operating in high switching frequency up to 800 kHz
allows employing small size inductor and capacitors. The part is able
to support all−ceramic−capacitor applications.
www.onsemi.com
QFN20
CASE 485BC
MARKING DIAGRAM
81278
ALYWG
G
Features
3.6 V to 24 V Input Voltage Range
Output Voltage up to 2.0 V with PWM VID Interface
Differential Output Voltage Sense
Integrated Gate Drivers
200 kHz ~ 800 kHz Switching Frequency
Power Saving Interface (PSI)
Support both 3.3 V and 1.8 V VID
Power Good Output
Programmable Over Current Protection
Over Voltage Protection
Under Voltage Protection
Thermal Shutdown Protection
QFN20, 3x3 mm, 0.4 mm Pitch Package
81278
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
PH1
LG1
PVCC
LG2
PH2
•
•
•
•
•
•
•
•
•
•
•
•
•
1
BST1
HG1
EN
PSI
VID
Typical Applications
VIDBUF
REFIN
VREF
FS
FBRTN
• GPU and CPU Power
• Graphics Card Applications
• Desktop and Notebook Applications
GND
BST2
HG2
PGOOD
COMP/ILMT
FB
(Top View)
ORDERING INFORMATION
Device
NCP81278MNTXG
Package
Shipping†
QFN20
(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, 2016
May, 2016 − Rev. 3
1
Publication Order Number:
NCP81278/D
