NCP81234 datasheet(1/19 Pages) ONSEMI

Part #	NCP81234

Description	Dual-Channel/Two-Phase Controller for DrMOS

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Manufacturer	ONSEMI [ON Semiconductor]

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November, 2015 − Rev. 0

1

Publication Order Number:

NCP81234/D

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

QFN28

MN SUFFIX

CASE 485BQ

Device

Package

Shipping†

ORDERING INFORMATION

NCP81234MNTXG

QFN28

(Pb−Free)

5000 /

Tape & Reel

MARKING DIAGRAM

www.onsemi.com

†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.

XXXXXXXX

AWLYYWW

G

1

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)

28

1

VIN

5

4

3

2

1

EN1

EN2

PGOOD1

7

6 PGOOD2

GND

29

ISP1

17

18

19

20

21

ISP2

ISN1

PWM2

ISN2

15

16

FB2

12

11

10

9

8

14

13

COMP2

24

23

22

28

27

26

25

DRVON

FAULT

PINOUT

(Top View)

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