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LX1677CPW Datasheet

  • LX1677CPW

  • PWM Controllers

  • 339.87KB

  • 16頁

  • ETC

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LX1677
I N T E G R A T E D
P R O D U C T S
AMD Hammer餂?VRM Controller
P
RELIMINARY
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
High Current Biphase
Operation
Outputs As Low As 0.800V
鈥?Biphase LoadSHARE
TM
鈥?Transient Correction Loop
Reduces Required
Capacitance
Differential Amplifier For
Remote Voltage Sensing
Integrated High Current
MOSFET Drivers
200KHz to 1MHz Frequency
Operation
Programmable Slew Rate
Control For Start-Up Sequence
and VID change
VID Changes On The Fly
Power Good Indicator
Short Circuit Protection
Output Over Voltage and
Under Voltage Protection
No current-sense resistors
APPLICATIONS
The LX1677 is a highly integrated
VRM power supply controller IC
featuring two PWM switching
regulator stages.
The two constant frequency
voltage-mode PWM phases are
configured as a single biphase high
current output core supply.
In biphase operation, the high
current (>35A) output is generated by
a LoadSHARE
TM
鈥?technique that
balances the currents in the two
phases. Power loss and noise, due to
the ESR of the input capacitors, are
minimized by operating the PWMs
180擄 out of phase.
A
synchronized
Transient
Correction
Loop鈥?/div>
provides
exceptional control of the output
droop and overshoot during very high
di/dt load changes, the circuit can be
configured for droop only, overshoot
only or both.
This architecture also minimizes
capacitor
requirements
while
maximizing regulator response.
A true differential input amplifier is
used for remote voltage sensing at the
processor core.
A VID code generator provides an
internal reference that will set the
output voltage. This VID code can be
changed during operation and the
reference will slew the output voltage to
its new setting at a preset rate. During
VID changes on the fly the Power Good
indication will stay valid.
The current through the lower phase
1 MOSFET will be sampled using its
R
DS(ON)
for current limit and shut
down.
For further protection, an over
voltage circuit will trip at a specified
setting and clamp the output by turning
off the upper MOSFETs and turning on
the lower MOSFETs.
The upper MOSFET drivers use a
bootstrap capacitor to provide the upper
drive voltage over the input voltage
range of 6 to 24 volts.
WWW .
Microsemi
.C
OM
AMD Hammer餂?Processor
Core Voltage Supply
Voltage Regulator Modules
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
we bsite:
http://www.microsemi.com
鈥?/div>
Patent numbers US6292378,US6285571,US6356063
PRODUCT HIGHLIGHT
T r a n s ie n t C o r e c tio n L o o p
V in + 5 V
V in 6 to 2 4 V
70nH
5 B it V ID
LX1677
V in 6 to 2 4 V
Vout
LX1677
LX1677
PACKAGE ORDER INFO
T
J
(擄C)
0 to 70
PW
38-Pin
Plastic TSSOP
LQ
38-Pin
Plastic MLPQ
LX1677-CPW
LX1677-CLQ
Note: Available in Tape & Reel.
Append the letter 鈥淭鈥?to the part number.
(i.e. LX1677-CLQT)
Copyright
錚?/div>
2000
Rev 0.2, 2003-03-03
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1

LX1677CPW 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 專用型

  • -

  • 控制器，Intel VRM

  • 4.5 V ~ 5.5 V

  • 1

  • 0.8 V ~ 1.55 V

  • 0°C ~ 70°C

  • 表面貼裝

  • 38-TFSOP（0.173"，4.40mm 寬）

  • 38-TSSOP

  • 管件

LX1677CPW相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    ADVANCED PWM CONTROLLER
    MICROSEMI ...
  • 英文版
    ADVANCED PWM CONTROLLER
    MICROSEMI
  • 英文版
    ADVANCED PWM CONTROLLER
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    SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC
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    SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC
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  • 英文版
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  • 英文版
    DUAL OUTPUT PWM CONTROLLERS WITH 5-BIT DAC
    MICROSEMI
  • 英文版
    DUAL OUTPUT PWM CONTROLLERS WITH 5-BIT DAC
    MICROSEMI ...
  • 英文版
    PROGRAMMABLE MULTIPLE OUTPUT DC:DC CONTROLLER
    MICROSEMI
  • 英文版
    PROGRAMMABLE MULTIPLE OUTPUT DC:DC CONTROLLER
    MICROSEMI ...
  • 英文版
    PROGRAMMABLE DC : DC CONTROLLER
    MICROSEMI
  • 英文版
    PROGRAMMABLE DC : DC CONTROLLER
    MICROSEMI ...
  • 英文版
    5 - BIT PROGRAMMABLE VOTAGE REFERENCE
    MICROSEMI
  • 英文版
    5 - BIT PROGRAMMABLE VOTAGE REFERENCE
    MICROSEMI ...
  • 英文版
    Multiple Output LoadSHARE? PWM
    MICROSEMI
  • 英文版
    Multiple Output LoadSHARE? PWM
    MICROSEMI ...
  • 英文版
    Multiple Output LoadSHARE PWM
    MICROSEMI
  • 英文版
    Multiple Output LoadSHARE PWM
    MICROSEMI ...

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