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NCP81234 fiches techniques PDF

ON Semiconductor - Dual-Channel/Two-Phase Controller

Numéro de référence NCP81234
Description Dual-Channel/Two-Phase Controller
Fabricant ON Semiconductor 
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NCP81234 fiche technique
NCP81234
Dual-Channel/Two-Phase
Controller for DrMOS
The NCP81234, a dual−channel/two−phase synchronous buck
controller, provides flexible power management solutions for
applications supported by DrMOS. Operating in high switching
frequency up to 1.2 MHz allows employing small size inductor and
capacitors.
Features
Single Vin = 4.5 ~ 20 V with Input Feedforward
Integrated 5.35 V LDO
Vout = 0.6 V ~ 5.3 V
Fsw = 200 k ~ 1.2 MHz
PWM Output Compatible to 3.3 V and 5 V DrMOS
Dual−Channel or Two−Phase Operation
DDR Power Mode Option
Interleaved Operation
Differential Current Sense Compatible for both Inductor DCR Sense
and DrMOS Iout
2 Independent Enables with Programmable Input UVLO
Programmable DrMOS Power Ready Detection (DRVON)
2 Power Good Indicators
Comprehensive Fault Indicator
Externally Programmable Soft Start and Delay Time
Programmable Hiccup Over Current Protection
Hiccup Under Voltage Protection
Recoverable Over Voltage Protection
Hiccup Over Temperature Protection
Thermal Shutdown Protection
QFN−28, 5x5 mm, 0.5 mm Pitch Package
This is a Pb−Free Device
Typical Applications
Telecom Applications
Server and Storage System
Multiple Rail Systems
DDR Applications
www.onsemi.com
1 28
QFN28
MN SUFFIX
CASE 485BQ
MARKING DIAGRAM
1
XXXXXXXX
XXXXXXXX
AWLYYWWG
G
XXXXX = Specific Device Code
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PINOUT
28 27 26 25 24 23 22
1 VIN
2 EN1
3 EN2
4 DRVON
5 PGOOD1
6 PGOOD2
7 FAULT
GND
29
ISP1 21
ISN1 20
ISP2 19
ISN2 18
PWM2 17
FB2 16
COMP2 15
8 9 10 11 12 13 14
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP81234MNTXG QFN28
5000 /
(Pb−Free) 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
November, 2015 − Rev. 0
1
Publication Order Number:
NCP81234/D

PagesPages 19
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