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參數資料
| 型號： | LX1671CLQ-TR |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封裝： | 7 X 5 MM, ROHS COMPLIANT, PLASTIC, MLPQ-38 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 419K |
| 代理商： | LX1671CLQ-TR |
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2000
Rev. 1.2b, 2006-02-13
WWW
.Microse
m
i
.CO
M
LX1671
Multiple Output LoadSHARE PWM
PRODUCTION DATA SHEET
TM
DESCRIPTION
The LX1671 is a highly integrated
power supply controller IC featuring
three PWM switching regulator stages
with an additional onboard linear
regulator driver.
Two of the constant frequency
voltage-mode PWM phases can be
easily configured for a single Bi-Phase
high current output or two in-
dependently regulated outputs. Each
phase
incorporates
a
fully
pro-
grammable soft-start sequence. This
versatility yields either three or four
independently regulated outputs with
full power sequencing capability giving
system
designers
the
ultimate
flexibility in power supply design.
In Bi-Phase operation, the high
current (>30A) output can utilize
different supply rails allowing Forced
Current
Sharing
from
different
sources. Power loss and noise, due to
the ESR of the input capacitors, are
minimized by operating each PWM
output 180
° out of phase. This
architecture also minimizes capacitor
requirements while maximizing re-
gulator response.
The additional outputs are capable of
supplying up to 5A (Linear Regulator
Driver) and 15A (Switching Regulator)
for I/O, memory, termination, and other
supplies surrounding today’s micro-
processor designs.
Each
PWM regulator
output
is
programmed via a simple voltage-divider
network.
The
LX1671,
utilizing
MOSFET RDS(ON) impedance, monitors
current limit conditions, in each PWM
phase, without the use of expensive
current sense resistors.
The LX1671 was designed to give
design engineers maximum flexibility
with respect to the MOSFET supply.
Each phase can utilize different supply
voltages for efficient use of available
supply rails.
Additionally, when two
phases are configured in Bi-Phase output,
the LoadSHARETM topology can be
programmed via inductor ESR selection.
There are three other methods that can
also be used with LoadSHARETM. These
other methods are presented in the theory
of operation section of this data sheet.
IMPORTANT:
For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
LoadSHARE is a Trademark of Microsemi Corporation
Protected by US Patents: 6,285,571 & 6,292,378
KEY FEATUR ES
Up to Four Independently
Regulated Outputs
Outputs As Low As 0.8V
Generated From An Internal 1%
Reference
Multiphase High Current Output
Reduces Required Capacitance
Integrated High Current MOSFET
Drivers
300kHz High Frequency Operation
Minimizes External Component
Requirements
Independent Phase Programmable
Soft-Start and Power Sequencing
Adjustable Linear Regulator Driver
Output
No current-sense resistors
DDR Termination Compliant
APPLICATIONS/BENEFITS
Multi-Output Power Supplies
Video Card Power Supplies
PC Peripherals
Portable PC Processor and I/O
Supply
PRODUCT H I GHLIGHT
Memory Bus
....
DDR Termination
Memory Core
12V
3.3V
I/O
Graphics
Controller
DDR Memory
LX1671
Refer to Typical
Application for
complete circuit.
5V
Core
PACKAGE ORDER INFO
PW
Plastic TSSOP
38-Pin
LQ
Plastic MLPQ
38-Pin
TA (°C)
RoHS Compliant / Pb-free Transition DC: 0518
RoHS Compliant / Pb-free Transition DC: 0512
0 to 70
LX1671CPW
LX1671CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1671CPW-TR)
LL
XX
11
66
77
11
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LX1671CPW | 功能描述:IC REG CTRLR BUCK PWM VM 38TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:LoadSHARE™ 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數:1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| LX1671CPW-TR | 制造商:Microsemi Corporation 功能描述:MULTIPLE OUTPUT LOADSHARE PWM - Tape and Reel |
| LX1671EVALKIT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Switching Regulator |
| LX1672 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Multiple Output LoadSHARE PWM |
| LX1672 EVAL KIT | 制造商:Microsemi Corporation 功能描述:SWITCHING REGULATOR - Bulk |
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