DataSheetWiki


LX1671 fiches techniques PDF

Microsemi Corporation - Multiple Output LoadSHARE PWM

Numéro de référence LX1671
Description Multiple Output LoadSHARE PWM
Fabricant Microsemi Corporation 
Logo Microsemi Corporation 





1 Page

No Preview Available !





LX1671 fiche technique
INTEGRATED PRODUCTS
LX1671
Multiple Output LoadSHARE™ PWM
PRODUCTION DATA SHEET
DESCRIPTION
The LX1671 is a highly integrated The additional outputs are capable of
power supply controller IC featuring supplying up to 5A (Linear Regulator
www.tDharteaeShPeeWt4UM.netswitching regulator stages Driver) and 15A (Switching Regulator)
with an additional onboard linear for I/O, memory, termination, and other
regulator driver.
supplies surrounding today’s micro-
Two of the constant frequency processor designs.
voltage-mode PWM phases can be Each PWM regulator output is
easily configured for a single Bi-Phase programmed via a simple voltage-divider
high current output or two in- network. The LX1671, utilizing
dependently regulated outputs. Each MOSFET RDS(ON) impedance, monitors
phase incorporates a fully pro- current limit conditions, in each PWM
grammable soft-start sequence. This phase, without the use of expensive
versatility yields either three or four current sense resistors.
independently regulated outputs with The LX1671 was designed to give
full power sequencing capability giving design engineers maximum flexibility
system designers the ultimate with respect to the MOSFET supply.
flexibility in power supply design.
Each phase can utilize different supply
In Bi-Phase operation, the high voltages for efficient use of available
current (>30A) output can utilize supply rails. Additionally, when two
different supply rails allowing Forced phases are configured in Bi-Phase output,
Current Sharingfrom different the LoadSHARETM topology can be
sources. Power loss and noise, due to programmed via inductor ESR selection.
the ESR of the input capacitors, are There are three other methods that can
minimized by operating each PWM also be used with LoadSHARETM. These
output 180° out of phase. This other methods are presented in the theory
architecture also minimizes capacitor of operation section of this data sheet.
requirements while maximizing re-
gulator response.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
LoadSHARE is a Trademark of Microsemi Corporation
PRODUCT HIGHLIGHT
KEY FEATURES
ƒ Up to Four Independently
Regulated Outputs
ƒ Outputs As Low As 0.8V
Generated From An Internal 1%
Reference
ƒ Multiphase High Current Output
Reduces Required Capacitance
ƒ Integrated High Current MOSFET
Drivers
ƒ 300kHz High Frequency Operation
Minimizes External Component
Requirements
ƒ Independent Phase Programmable
Soft-Start and Power Sequencing
ƒ Adjustable Linear Regulator Driver
Output
ƒ No current-sense resistors
ƒ DDR Termination Compliant
APPLICATIONS/BENEFITS
ƒ Multi-Output Power Supplies
ƒ Video Card Power Supplies
ƒ PC Peripherals
ƒ Portable PC Processor and I/O
Supply
Refer to Typical
Application for
com plete circuit.
DDR Term ination
....
Mem ory Core
12V
5V
LX1671
Core
Graphics
Controller
Mem ory Bus
DDR Mem ory
3.3V
I/O
Copyright © 2000
Rev. 1.0a, 2004-06-14
TA (°C)
0 to 70
PACKAGE ORDER INFO
Plastic TSSOP
Plastic MLPQ
PW 38-Pin
LQ 38-Pin
LX1671-CPW
LX1671-CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1671CPWTR)
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1

PagesPages 21
Télécharger [ LX1671 ]


Fiche technique recommandé

No Description détaillée Fabricant
LX1670 5 - BIT PROGRAMMABLE VOTAGE REFERENCE Microsemi Corporation
Microsemi Corporation
LX1670CD 5 - BIT PROGRAMMABLE VOTAGE REFERENCE Microsemi Corporation
Microsemi Corporation
LX1671 Multiple Output LoadSHARE PWM Microsemi Corporation
Microsemi Corporation
LX1672 Multiple Output LoadSHARE PWM Microsemi Corporation
Microsemi Corporation

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche