NX2139A

更新时间： 2024-11-17 06:00:43

品牌	Logo	应用领域
美高森美 - MICROSEMI		控制器手机
页数	文件大小	规格书
21页	857K
描述
SINGLE CHANNEL MOBILE PWM AND LDO CONTROLLER

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中文翻译

获取价格

数据手册

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NX2139A 数据手册

NX2139A

SINGLE CHANNEL MOBILE PWM AND LDO CONTROLLER

PRELIMINARY DATA SHEET

Pb Free Product

FEATURES

DESCRIPTION

Internal Boost Schottky Diode

The NX2139A controller IC is a compact Buck control-

ler IC with 16 lead MLPQ package designed for step

down DC to DC converter in portable applications. It

can be selected to operate in synchronous mode or

non-synchronous mode to improve the efficiency at light

load.Constant on time control provides fast response,

good line regulation and nearly constant frequency un-

der wide voltage input range. The NX2139A controller

is optimized to convert single supply up to 24V bus

voltage to as low as 0.75V output voltage. Over cur-

rent protection and FB UVLO followed by latch fea-

ture. A built-in LDO controller can drive an external N-

MOSFET to provide a second output voltage from ei-

ther PWM output source or other power source. Both

PWM controller and LDO controller have separate EN

feature. Other features includes: 5V gate drive capa-

bility, power good indicator, over voltage protection,

internal Boost schottky diode and adaptive dead band

control.

Ultrasonic mode operation available

Bus voltage operation from 4.5V to 24V

Less than 1uA shutdown current with Enable low

Excellent dynamic response with constant on time

control

Selectable between Synchronous CCM mode and

diode emulation mode to improve efficiency at

light load

Programmable switching frequency

Current limit and FB UVLO with latch off

Over voltage protection with latch off

LDO controller with seperate enable

Two independent Power Good indicator available

^{Pb-free and RoHS comp}A^lianP^tPLICATIONS

Notebook PCs and Desknotes

Tablet PCs/Slates

On board DC to DC such as

12V to 3.3V, 2.5V or 1.8V

Hand-held portable instruments

TYPICAL APPLICATION

1MEG

PGOOD

TON

VIN 7V~22V

100k

2x10uF

PVCC

VCC

HDRV

BST

IRF7807

2.2

Vout 1.8V/7A

1.5uH

2R5TPE330MC

330uF

AO4714

LDRV

ENSW

/MODE

OCSET

VOUT

330p

10.5k

7.5k

SI4800

LDODRV

1.5V@2A

ENLDO

LDOPG

33n

20k

7.5k

2x10uF

100k

LDOFB

LDOPG

GND

PAD

Figure1 - Typical application of NX2139A

ORDERING INFORMATION

Device

Temperature

Package

Pb-Free

Yes

NX2139ACMTR -10^oC to 100^oC 3X3 MLPQ-16L

Rev. 2.3

03/19/09

12 3 4 5 6 7...21

中文翻译

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与NX2139A相关器件

型号	品牌	获取价格	描述	数据表
NX2139ACMTR	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM AND LDO CONTROLLER
NX2141	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM CONTROLLER WITH FEEDFORWARD AND ENABLE
NX2141CMTR	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM CONTROLLER WITH FEEDFORWARD AND ENABLE
NX2141CUTR	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM CONTROLLER WITH FEEDFORWARD AND ENABLE
NX2142	MICROSEMI	获取价格	SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD AND 5V BIAS REGULATOR
NX2142A	MICROSEMI	获取价格	SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD AND 5V BIAS REGULATOR
NX2142ACUTR	MICROSEMI	获取价格	SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD AND 5V BIAS REGULATOR
NX2142CUTR	MICROSEMI	获取价格	SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD AND 5V BIAS REGULATOR
NX2147	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM CONTROLLER WITH DYNAMIC VOLTAGE ADJUSTMENT
NX2147CMTR	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM CONTROLLER WITH DYNAMIC VOLTAGE ADJUSTMENT

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