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參數(shù)資料
| 型號(hào)： | LX1676-CPWT |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO38 |
| 封裝： | PLASTIC, TSSOP-38 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 391K |
| 代理商： | LX1676-CPWT |
LX1676
PRELIMINARY DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
WWW
.Microse
m
i
.CO
M
Mobile AMD Athlon
VRM Controller
I N T E GR A T ED
PRODUCT S
Copyright
2000
Revision: 0.4a, 2003-02-25
DESCRIPTION
The LX1676 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 (>25A) output is generated by
a LoadSHARETM 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
° out of phase.
A
synchronized
Transient
Correction Loop provides except-
ional 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.
Current through the lower phase 1
MOSFET will be sampled using its
RDS(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 will use
a bootstrap capacitor to provide the
upper drive voltage over the input
voltage range of 6 to 24 volts.
IMPORTANT:
For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Patent numbers US6292378,US6285571,US6356063, US6605931
KEY FEATUR ES
High Current Biphase
Operation
Outputs As Low As 0.925V
Biphase LoadSHARE
TM
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
APPLI C ATION S
AMD Mobile Athlon
or
Duron
Processor Core
Voltage Supply
Voltage Regulator Modules
PRODUCT H I GHLIGHT
L X 16 76
5 B i t V I D
70n H
Tr a n s i e n t C o r r e c t i on Loop
Vi n 6 t o 2 4 V
V out
Vi n + 5 V
PACKAGE ORDER INFO
TJ (°C)
PW
Plastic TSSOP
38-Pin
LQ
Plastic MLPQ
38-Pin
0 to 70
LX1676-CPW
LX1676-CLQ
Note: Available in Tape & Reel.
Append the letter “T” to the part number.
(i.e. LX1676-CLQT)
LL
XX
11
66
77
66
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX1677 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:AMD64 Processor VRM Controller |
| LX1677 EVAL KIT | 制造商:Microsemi Corporation 功能描述:PWM CONTROLLERS - Bulk |
| LX1677CLQ | 功能描述:IC CTRLR VRM PS 2PHASE 38MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| LX1677CPW | 功能描述:IC CTRLR VRM PS 2PHASE 38TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| LX1681 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:VOLTAGE - MODE PWM CONTROLLERS |
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