Datasheet > NX2142CUTR

NX2142CUTR

更新时间： 2024-11-02 06:00:43

品牌	Logo	应用领域
美高森美 - MICROSEMI		稳压器控制器
页数	文件大小	规格书
18页	525K
描述
SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD AND 5V BIAS REGULATOR

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中文翻译

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数据手册

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NX2142CUTR 数据手册

NX2142/2142A

SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD

AND 5V BIAS REGULATOR

ADVANCE DATA SHEET

Pb Free Product

FEATURES

DESCRIPTION

Bus voltage operation from 7V to 24V

5V bias regulator available

The NX2142/2142A controller IC is a compact synchro-

nous Buck controller IC with 10 lead MSOP package

designed for step down DC to DC converter applica-

tions with voltage feedforward functionality. Voltage

feedforward provides fast response, good line regula-

tion and nearly constant power stage gain under wide

voltage input range. The NX2142/2142A controller is

optimized to convert single supply up to 24V bus volt-

age to as low as 0.8V output voltage. NX2142/2142A

can function as a single supply controller with its 5V

bias regulator. Internal UVLO keeps the regulator off

until the supply voltage exceeds 7V where internal digi-

tal soft starts get initiated to ramp up output. The

NX2142/2142A employs fixed current limiting and FB

UVLO followed by hiccup feature. Other features in-

cludes: 5V gate drive capability , Converter Shutdown

by pulling COMP pin to Gnd, Adaptive dead band con-

trol.

Excellent dynamic response with input voltage

feed-forward and voltage mode control

Fixed 600kHz, 1MHz switching frequency

Internal Digital Soft Start Function

Fixed internal hiccup current limit

FB UVLO followed by hiccup feature

Shutdown by pulling COMP pin low

Pb-free and RoHS compliant

APPLICATIONS

Graphic Card on board converters

Vddq Supply in mother board applications

On board DC to DC such as

12V to 3.3V, 2.5V or 1.8V

Set Top Box and LCD Display

TYPICAL APPLICATION

Vin

+8 to 20V

25TQC33M

47uF

1uF

MMBT3904

BAT54A

1uF

0.1uF

BST

Hdrv

VCC

REGOUT

AO4800(half)

DO3316P-682

VIN

0.1uF

20k

Vout

COMP

+3.3V /3A

1000uF,30mohm

27pF

AO4800(half)

Ldrv

5.2nF

Gnd

324

Figure1 - Typical application of NX2142

ORDERING INFORMATION

Device

NX2142CUTR

NX2142ACUTR

Temperature

0 to 70^oC

Package

MSOP-10L

Frequency

600kHz

1MHz

Pb-Free

Yes

Rev. 1.1

10/28/07

12 3 4 5 6 7...18

中文翻译

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