NCP81234 Datasheet, PDF (1/19 Pages) ON Semiconductor – Dual-Channel/Two-Phase Controller for DrMOS

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
1
November, 2015 − Rev. 0
Publication Order Number:
NCP81234/D