Datasheet > NX2155H

NX2155H

更新时间： 2024-11-02 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
17页	770K
描述
SINGLE POWER SUPPLY SYNCHRONOUS PWM CONTROLLER

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NX2155H 数据手册

NX2155H

SINGLE POWER SUPPLY SYNCHRONOUS PWM CONTROLLER

ADVANCED DATA SHEET

Pb Free Product

FEATURES

DESCRIPTION

The NX2155H controller IC is a single input supply syn-

chronous Buck controller IC designed for step down DC

to DC converter applications. NX2155H is optimized to

convert bus voltages from 8V to 22V to output as low as

0.8V voltage. An internal regulator converts bus voltage

to 5V, which provides voltage supply to internal logic

and driver circuit. The NX2155H can operates at pro-

grammable frequency of 2MHz and employs loss-less

current limiting by sensing the Rdson of synchronous

MOSFET followed by hiccup feature.Feedback under

voltage triggers Hiccup.

Single supply voltage from 8V to 22V

Internal 5V regulator

n Programmable operational frequency of 2MHz

n Internal Digital Soft Start Function

n Less than 50 nS adaptive deadband

Current limit triggers hiccup by sensing Rdson of

Synchronous MOSFET

n Pb-free and RoHS compliant

APPLICATIONS

LCD TV

Graphic Card on board converters

Memory Vddq Supply in mother board applications

On board DC to DC such as

12V to 3.3V, 2.5V or 1.8V

Hard Disk Drive

Other features of the device are: Internal schottky di-

ode, thermal shutdown, 5V gate drive, adaptive

deadband control, internal digital soft start, 5VREG

undervoltage lock out and Shutdown capability via the

comp pin.

Set Top Box

TYPICAL APPLICATION

VIN

+12V

10u

VIN

BST

0.1u

AO6800

HDRV

5VREG

4.7u

VOUT

+5V@2A

300

OCP

2 x (10uF,10V,X5R)

4.22k

LDRV

49.9k

9.53k

180p

COMP

GND(PAD)

15k

10p

Figure1 - Typical application of 2155H

ORDERING INFORMATION

Device

NX2155HCUPTR

Temperature

0 to 70^oC

Package

MSOP-EP-10L

Package Marking

NX155HXXX

Pb-Free

Yes

Note: XXX is date code. For example, 841 means that this NX2155H is packaged in the 41th week of

2008

Rev.1.1

04/16/09

12 3 4 5 6 7...17

中文翻译

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