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參數(shù)資料
| 型號(hào)： | LFC789D25-ADJ |
| 英文描述： | Dual Linear FET Controller |
| 中文描述： | 雙直線場(chǎng)效應(yīng)管控制器 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 145K |
| 代理商： | LFC789D25-ADJ |
LFC789D25-ADJ
DUAL LINEAR FET CONTROLLER
SLLS565 – MARCH 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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)
Adjustable Output Can Be Set Via an
External Reference Pin, Allowing for the
Creation of a Tracking Regulator
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
The LFC789D25-ADJ is a dual linear FET controller that simplifies the design of dual power supplies. The device
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
DS(on)
of the external power MOSFET and the load
current, very low dropout can be achieved via proper selection of the power MOSFET.
Packaged in 8-pin SOIC and space-saving TSSOP, the LFC789D25-ADJ is characterized for operation from
0
°
C to 70
°
C.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SOIC (D)
Tube of 75
LFC789D25-ADJCD
KADAC
0
°
C to 70
°
C
Reel of 2500
LFC789D25-ADJCDR
TSSOP (PW)
Tube of 150
LFC789D25-ADJCPW
KADAC
Reel of 2000
LFC789D25-ADJCPWR
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
1
2
3
4
8
7
6
5
DRV_V
ADJ
SEN_V
ADJ
V
REF
GND
V
CC
DRV_V
25
SEN_V
25
NC
D OR PW PACKAGE
(TOP VIEW)
NC – No internal connection
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.
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參數(shù)描述 |
|---|---|
| LFC789D25-ADJCDR | 制造商:Texas Instruments 功能描述:obsolete - ORDER LFC789D25CDR |
| LFC789D25CD | 功能描述:低壓差控制器 - LDO Dual Linear FET Controller RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6 |
| LFC789D25CDE4 | 功能描述:低壓差控制器 - LDO Dual Linear FET Controller RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6 |
| LFC789D25CDG4 | 功能描述:低壓差控制器 - LDO Dual Lin FET Cntrlr RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6 |
| LFC789D25CDR | 功能描述:低壓差控制器 - LDO Dual Linear FET Controller RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6 |
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