Datasheet > 电源电路 > 开关式稳压器或控制器> NX2305CMTR

NX2305CMTR

更新时间： 2024-11-18 05:53:43

品牌	Logo	应用领域
美高森美 - MICROSEMI		控制器
页数	文件大小	规格书
19页	579K
描述
SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER WITH NMOS LDO CONTROLLER, POWER GOOD & ENABLES

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中文翻译

获取价格

数据手册

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NX2305CMTR 数据手册

Evaluation board available.

NX2305

SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER

WITH NMOS LDO CONTROLLER, POWER GOOD & ENABLES

PRELIMINARY DATA SHEET

Pb Free Product

FEATURES

DESCRIPTION

n 12V PWM controller plus LDO controller

The NX2305 controller IC is a combination synchronous

Buck and LDO controller IC designed to convert single

12V supply to low cost dual on board supply applica-

tions. The synchronous controller is used for high cur-

rent high efficiency step down DC to DC converter appli-

cations while the LDO controller in conjunction with an

external low cost N ch MOSFET can be used as a very

low drop out regulator in applications such as converting

3.3V to 2.5V output. Internal UVLO keeps both regula-

tors off until the supply voltage exceeds 9V where inde-

pendent internal digital soft starts get initiated to ramp

up both outputs.The switching section has hiccup cur-

rent limit by sensing the Rdson of synchronous MOSFET.

The LDO controller has Feedback Under Voltage Lock

Out as a short circuit protection.Other features includes:

12V gate drive capability , Adaptive dead band control,

Power good flag for the switcher controller and separate

Enable pins for independent power sequencing.

n Hiccup current limit by sensing Rdson of MOSFET

12V high side and low side driver

n Fixed internal 300kHz for switching controller

n Dual Independent Digital Soft Start Function

n Adaptive Deadband Control

n Enable pin available to program the Vbus UVLO

n Shut Down switching and LDO via pulling down

EnSW or ENLDO pins

n Pb-free and RoHS compliant

APPLICATIONS

PCI Graphic Card on board converters

Mother board On board DC to DC applications

On board Single Supply 12V DC to DC such as

12V to 3.3V, 2.5V or 1.8V

Set Top Box and LCD Display

TYPICAL APPLICATION

R14

C11

open

C12

1uF

0.1uF

VCC

5V REG

PVCC

10k

L1 1uH

1N4148

VIN2

VIN1

+12V

PGOOD

+3.3V

100uF

LDO OUT

180uF

47uF

BST

0.1uF

C10 150pF

VOUT2

+1.6V/2A

IRFR3709Z

HDRV

LDO FB

ENLDO

L2 2.2uH

VOUT1

150uF

25mohm

+1.8V/10A

2 x 470uF

R10

VIN2

+3.3V

OCP

LDRV

PGND

R11

1.4k

0.75k

IRFR3709Z

1.1k

10k

HI=SD

3.9nF

R12

6.8k

VIN1

+12V

ENSW

10k

R13

1.4k

COMP

5.6nF

AGND

HI=SD

C13 100pF

Figure1 - Typical application of NX2305

ORDERING INFORMATION

Device

NX2305CMTR

NX2305CSTR

Temperature

0 to 70^oC

Package

MLPQ-16L

SOIC -16L

Frequency

300kHz

Pb-Free

Yes

0 to 70^oC

Rev.5.0

08/19/08

12 3 4 5 6 7...19

中文翻译

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与NX2305CMTR相关器件

型号	品牌	获取价格	描述	数据表
NX2305CSTR	MICROSEMI	获取价格	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER WITH NMOS LDO CONTROLLER, POWER GOOD & ENABLE
NX2307	MICROSEMI	获取价格	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER
NX2307CSTR	MICROSEMI	获取价格	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER
NX2309	MICROSEMI	获取价格	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER WITH NMOS LDO CONTROLLER
NX2309CMTR	MICROSEMI	获取价格	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER WITH NMOS LDO CONTROLLER
NX2309CUTR	MICROSEMI	获取价格	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER WITH NMOS LDO CONTROLLER
NX23SA	DIODES	获取价格	2.5mmx2.0mm LVDS 2-frequency Programmable XO
NX23SB	DIODES	获取价格	2.5mmx2.0mm LVDS 4-frequency Programmable XO
NX24000000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block
NX24003000J0G	AMPHENOL	获取价格	Barrier Strip Terminal Block

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