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NX2119ACSTR PDF预览

NX2119ACSTR

更新时间: 2024-11-02 06:00:39
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

NX2119ACSTR 数据手册

 浏览型号NX2119ACSTR的Datasheet PDF文件第2页浏览型号NX2119ACSTR的Datasheet PDF文件第3页浏览型号NX2119ACSTR的Datasheet PDF文件第4页浏览型号NX2119ACSTR的Datasheet PDF文件第5页浏览型号NX2119ACSTR的Datasheet PDF文件第6页浏览型号NX2119ACSTR的Datasheet PDF文件第7页 
Evaluation board available.  
NX2119/2119A  
SYNCHRONOUS PWM CONTROLLER WITH  
CURRENT LIMIT PROTECTION  
PRELIMINARY DATA SHEET  
Pb Free Product  
FEATURES  
DESCRIPTION  
n
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  
n
n
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.  
n
On board DC to DC such as  
12V to 3.3V, 2.5V or 1.8V  
ADSL Modem  
n
TYPICAL APPLICATION  
L2 1uH  
Vin  
+5V  
C4  
100uF  
C5  
1uF  
Cin  
280uF  
18mohm  
R5  
10  
D1  
MBR0530T1  
C3  
1uF  
5
1
C6  
0.1uF  
Vcc  
BST  
M1  
2
Hdrv  
7
6
COMP  
M3  
L1 1.5uH  
HI=SD  
Vout  
R4  
37.4k  
8
4
SW  
Ldrv  
+1.8V 9A  
Co  
C7  
27pF  
R1  
4k  
2 x (1500uF,13mohm)  
M2  
C2  
2.2nF  
R2  
FB  
C1  
4.7nF  
10k  
Gnd  
3
R3  
8k  
Figure1 - Typical application of 2119  
ORDERING INFORMATION  
Device  
Temperature  
0 to 70oC  
Package  
SOIC - 8L  
SOIC - 8L  
MSOP - 8L  
Frequency  
300kHz  
600kHz  
Pb-Free  
Yes  
Yes  
NX2119CSTR  
NX2119ACSTR  
NX2119ACUTR  
0 to 70o C  
0 to 70o C  
600kHz  
Yes  
Rev.3.2  
04/10/08  
1

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