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參數資料
| 型號： | LX1672-03CPW |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multiple Output LoadSHARE PWM |
| 中文描述： | 1 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-28 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 358K |
| 代理商： | LX1672-03CPW |
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2000
Rev. 0.3m, 2005-04-12
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M
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LX1672
Multiple Output LoadSHARE PWM
P
RELIMINARY
D
ATA
S
HEET
TM
D E S C R I P T I O N
The LX1672 is a highly integrated
power supply controller IC featuring
two PWM switching regulator stages
with an additional onboard linear
regulator driver.
The two constant frequency voltage-
mode PWM phases can be easily
configured as a single Bi-Phase high
current output, two independently
regulated outputs, or as a DDR memory
I/O supply with a tracking DDR
termination voltage supply. 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
capacitor
requirements
maximizing regulator response.
In bi-phase operation, the high
current output utilizes a patented current
sharing architecture, called Forced
Current Sharing
, to allow accurate
current sharing without the use of
expensive current sense resistors.
also
minimizes
while
This patented approach also gives
system designers maximum flexibility with
respect to MOSFET supply. Each phase
can utilize different supply voltages, for
efficient use of available supplies, while
programming the ratio of current pulled
from each using one of three methods (see
application section).
The
LX1672
programmable
soft-start
capabilities. Each output can be
configured to come up in any order
necessary as required by the application.
The LX1672 features an additional
Linear Regulator Driver output, which
when coupled with an inexpensive
MOSFET is capable of supplying up to 5A
for I/O, memory, and other supplies
surrounding
today’s
designs.
Each regulator voltage output is
programmed via a simple voltage-divider
network. The LX1672, utilizing MOSFET
RDS(ON) impedance, monitors maximum
current limit conditions, in each PWM
phase without the use of expensive current
sense resistors.
incorporates
fully
sequencing
micro-processor
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
LoadSHARE is a Trademark of Microsemi Corporation
K E Y F E A T U R E S
Up to Three Independently
Regulated Outputs
DDR Termination Compliant
Bi-phase Current Sharing
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, 500KHz and 600KHz
High Frequency Operation
Minimizes External Component
Requirements
Independent Phase Programmable
Soft-Start and Power Sequencing
Adjustable Linear Regulator Driver
Output
No current-sense resistors
APPLICAT IONS /BENEFIT S
Multi-Output Power Supplies
Video Card Power Supplies
DDR, VDDQ and Termination
Supply
PC Peripherals
Portable PC Processor and I/O
Supply
P R O D U C T H I G H L I G H T
Memory Bus
....
DDR Termination
Memory Core
12V
3.3V
I/O
Graphics
Controller
DDR Memory
LX1672
Refer to Typical
Application for
complete circuit.
5V
PACK AGE ORDER INFO
Plastic TSSOP
28-Pin
RoHS Compliant / Pb-free Transition DC: 0518
LX1672-03CPW
LX1672-05CPW
PW
LQ
RoHS Compliant / Pb-free Transition DC: 0512
LX1672-03CLQ
Plastic MLPQ
38-Pin
T
A
(
°
C)
Switching
Frequency (kHz)
0 to 70
0 to 70
0 to 70
300
500
600
LX1672-06CLQ
NOTE: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1672-06CLQ-TR)
L
X
1
6
7
2
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LX1672-03CPW-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT HI/LO SIDE HALF BRDG NON-INV 28TSS - Tape and Reel |
| LX1672-05CPW | 功能描述:IC REG CTRLR BUCK PWM VM 28TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:LoadSHARE™ 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數:1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 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:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LX1672-05CPW-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT HI/LO SIDE HALF BRDG NON-INV 28TSS - Tape and Reel |
| LX1672-06CLQ | 功能描述:IC REG CTRLR BUCK PWM VM 38MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)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) |
| LX1672-06CLQ-TR | 制造商:Microsemi Corporation 功能描述:MOSFET DRVR 0.8V 1A 3-OUT HI/LO SIDE HALF BRDG NON-INV 38MLP - Tape and Reel |
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