Datasheet > NX2119A

NX2119A

更新时间： 2024-11-30 06:00:43

品牌	Logo	应用领域
美高森美 - MICROSEMI		控制器
页数	文件大小	规格书
16页	499K
描述
SYNCHRONOUS PWM CONTROLLER WITH CURRENT LIMIT PROTECTION

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中文翻译

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数据手册

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NX2119A 数据手册

Evaluation board available.

NX2119/2119A

SYNCHRONOUS PWM CONTROLLER WITH

CURRENT LIMIT PROTECTION

PRELIMINARY DATA SHEET

Pb Free Product

FEATURES

DESCRIPTION

Bus voltage operation from 2V to 25V

The NX2119 controller IC is a synchronous Buck con-

troller IC designed for step down DC to DC converter

applications. It is optimized to convert bus voltages from

2V to 25V to outputs as low as 0.8V voltage. The

NX2119 operates at fixed 300kHz, while NX2119A oper-

ates at fixed 600kHz, making it ideal for applications

requiring ceramic output capacitors. The NX2119 em-

ploys fixed loss-less current limiting by sensing the Rdson

of synchronous MOSFET followed by latch out feature.

Feedback under voltage triggers Hiccup.

n Fixed 300kHz and 600kHz

n Internal Digital Soft Start Function

n Prebias Startup

n Less than 50 nS adaptive deadband

Current limit triggers latch out by sensing Rdson of

Synchronous MOSFET

No negative spike at Vout during startup and

shutdown

n Pb-free and RoHS compliant

Other features of the device are: 5V gate drive,Adaptive

deadband control, Internal digital soft start, Vcc n Graphic Card on board converters

undervoltage lock out and shutdown capability via the n Memory Vddq Supply

APPLICATIONS

comp pin.

On board DC to DC such as

12V to 3.3V, 2.5V or 1.8V

ADSL Modem

TYPICAL APPLICATION

L2 1uH

Vin

+5V

100uF

1uF

Cin

280uF

18mohm

MBR0530T1

1uF

0.1uF

Vcc

BST

Hdrv

COMP

L1 1.5uH

HI=SD

Vout

37.4k

Ldrv

+1.8V 9A

27pF

2 x (1500uF,13mohm)

2.2nF

4.7nF

10k

Gnd

Figure1 - Typical application of 2119

ORDERING INFORMATION

Device

Temperature

0 to 70^oC

Package

SOIC - 8L

MSOP - 8L

Frequency

300kHz

600kHz

Pb-Free

Yes

NX2119CSTR

NX2119ACSTR

NX2119ACUTR

0 to 70^oC

600kHz

Yes

Rev.3.2

04/10/08

12 3 4 5 6 7...16

中文翻译

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