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Semiconductor Components Industries, LLC, 2013
April, 2013 − Rev. 1
1 Publication Order Number:
NCP81172/D
NCP81172
2-Phase Synchronous Buck
Controller with Integrated
Gate Drivers and PWM VID
Interface
The NCP81172, a general−purpose two−phase synchronous buck
controller, integrates gate drivers and PWM VID interface in a
QFN−24 package and provides a compact−footprint power
management solution for new generation computing processors. It
receives power save command (PSI) from processors and operates 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.
Features
4.5 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)
Power Good Output
Programmable Over Current Protection
Over Voltage Protection
Under Voltage Protection
Temperature Sense and Alert Output
Thermal Shutdown Protection
QFN−24, 4 x 4 mm, 0.5 mm Pitch Package
This is a Pb−Free Device
Typical Applications
GPU and CPU Power
Graphics Card Applications
Desktop and Notebook Applications
QFN24
CASE 485L
MARKING DIAGRAM
http://onsemi.com
Device Package Shipping
†
ORDERING INFORMATION
NCP81172MNTXG QFN24
(Pb−Free)
4000 / 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.
PH219
LG220
PVCC21
PGND22
LG123
PH124
COMP
FB
FBRTN
FS
VREF
REFIN
12
11
10
9
8
7
654321
BST1
HG1
EN
PSI
VID
VIDBUF
131415161718
BS T2
HG2
PG OOD
VCC
TALERT#
TSNS
25
GND
(Top View)
PINOUT
24
1
81172 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
81172
ALYWG
G
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 5
- ・ Abmessungen des Paketumrisses on Seite 14
- ・ Paket-Footprint-Pad-Layout on Seite 14
- ・ Teilenummerierungssystem on Seite 1 Seite 14
- ・ Markierungsinformationen on Seite 1 Seite 14
- ・ Blockdiagramm on Seite 4
- ・ Typisches Anwendungsschaltbild on Seite 1 Seite 2 Seite 3 Seite 12
- ・ Anwendungsbereich on Seite 1
- ・ Elektrische Spezifikation on Seite 6 Seite 7 Seite 8 Seite 9
