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LFC789D25CPWR Datasheet

  • LFC789D25CPWR

  • DUAL LINEAR FET CONTROLLER

  • 11頁

  • TI

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LFC789D25
DUAL LINEAR FET CONTROLLER
SLLS565B 鈭?MARCH 2003 鈭?REVISED SEPTEMBER 2004
D
Two Independent Controllers for
Regulation of:
鈭?Fixed 2.5-V and an Adjustable Output
鈭?/div>
鹵2%
(Max) Regulation Across
Temperature and Load (1 mA to 3 A)
D OR PW PACKAGE
(TOP VIEW)
D
Adjustable Output Can Be Set Via an
External Reference Pin, Allowing for the
Creation of a Tracking Regulator
DRV_V
ADJ
SEN_V
ADJ
V
REF
GND
1
2
3
4
8
7
6
5
V
CC
DRV_V
25
SEN_V
25
NC
NC 鈭?No internal connection
D
Great Design Flexibility With Minimal
External Components
D
Applications: High-Current, Low-Dropout
Regulators for:
鈭?DDR/RDRAM Memory Termination
鈭?Motherboards
鈭?Chipset I/O
鈭?GTLP Termination
description/ordering information
The LFC789D25 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
鹵2%
across temperature and load.
The LFC789D25 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 simply is 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 is characterized for operation from 0擄C to
70擄C.
ORDERING INFORMATION
TA
SOIC (D)
0擄C to 70擄C
TSSOP (PW)
PACKAGE鈥?/div>
Tube of 75
Reel of 2500
Tube of 150
Reel of 2000
ORDERABLE
PART NUMBER
LFC789D25CD
LFC789D25CDR
LFC789D25CPW
LFC789D25CPWR
KADAC
KADAC
TOP-SIDE
MARKING
鈥?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.
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.
Copyright
錚?/div>
2004, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

LFC789D25CPWR 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 線性晶體管驅(qū)動(dòng)器

  • -

  • 正，固定式和可調(diào)式

  • 2

  • 2.5V，可調(diào)

  • 2.5mA

  • 9 V ~ 16 V

  • 0°C ~ 70°C

  • 8-TSSOP（0.173"，4.40mm 寬）

  • 8-TSSOP

  • Digi-Reel®

  • 296-17215-6

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