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LFC789D25-ADJ

更新时间： 2024-09-20 23:46:11
品牌 Logo 应用领域
其他 - ETC 控制器
页数 文件大小 规格书
10页 147K
描述
Dual Linear FET Controller

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LFC789D25-ADJ 数据手册

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LFC789D25-ADJ  
DUAL LINEAR FET CONTROLLER  
SLLS565 – MARCH 2003  
D OR PW PACKAGE  
(TOP VIEW)  
Two Independent Controllers for  
Regulation of:  
– Fixed 2.5-V and an Adjustable Output  
– ±2% (Max) Regulation Across  
Temperature and Load (1 mA to 3 A)  
DRV_V  
SEN_V  
V
V
CC  
1
2
3
4
8
7
6
5
ADJ  
ADJ  
DRV_V  
SEN_V  
NC  
25  
25  
REF  
GND  
Adjustable Output Can Be Set Via an  
External Reference Pin, Allowing for the  
Creation of a Tracking Regulator  
NC – No internal connection  
Great Design Flexibility With Minimal  
External Components  
Applications: High-Current, Low-Dropout  
Regulators for:  
– DDR/RDRAM Memory Termination  
– Motherboards  
– Chipset I/O  
– GTLP Termination  
description/ordering information  
TheLFC789D25-ADJisaduallinearFETcontrollerthatsimplifiesthedesignofdualpowersupplies. Thedevice  
consists of two independent controllers, each of which drives an external MOSFET to implement a low-dropout  
regulator. One controller is programmed to regulate a fixed 2.5-V output, while the second controller can be  
programmed to regulate any desired output voltage via a reference input pin, allowing for the creation of a  
tracking regulator often needed for termination schemes. And because heating effects of the external FETs  
easily can be isolated from the controllers, the controllers can regulate the output voltages to a maximum  
tolerance of ±2% across temperature and load.  
The LFC789D25-ADJ allows designers a great deal of flexibility in selecting external components and topology  
to implement their specific power-supply needs. With appropriate heat sinking, the designer can build a  
regulator with as much current capability as allowed by the external MOSFET and power supply. And, because  
the dropout of the regulator is simply the product of the R  
current, very low dropout can be achieved via proper selection of the power MOSFET.  
of the external power MOSFET and the load  
DS(on)  
Packaged in 8-pin SOIC and space-saving TSSOP, the LFC789D25-ADJ is characterized for operation from  
0°C to 70°C.  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
T
A
PACKAGE  
Tube of 75  
LFC789D25-ADJCD  
SOIC (D)  
KADAC  
Reel of 2500 LFC789D25-ADJCDR  
Tube of 150 LFC789D25-ADJCPW  
Reel of 2000 LFC789D25-ADJCPWR  
0°C to 70°C  
TSSOP (PW)  
KADAC  
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines  
are available at www.ti.com/sc/package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2003, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...10

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