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參數資料
| 型號： | LTC6909CMS#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 0K |
| 代理商： | LTC6909CMS#PBF |
LTC6909
1
6909fa
n
Synchronizing Multiple Switching Power Supplies
ApplicAtions
L
, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 6342817, 6614313,
7417509.
1 to 8 Output, Multiphase
Silicon Oscillator with Spread
Spectrum Modulation
The LTC6909 is an easy to use precision oscillator that
can provide 1-, 2-, 3-, 4-, 5-, 6-, 7- or 8-phase synchro-
nized outputs. The LTC6909 also offers spread spectrum
frequencymodulation(SSFM),whichcanbeenabledtoim-
prove electromagnetic compatibility (EMC) performance.
Eight separate outputs provide up to eight rail-to-rail,
50% duty cycle clock signals. Using three logic inputs, the
outputs are configured for phase separation, ranging from
45° to 120° (three to eight phases). The clock outputs can
also be held low or configured for Hi-Z. A single resistor,
combined with the phase configuration, sets the output
frequency, based on the following formula:
fOUT = 20MHz 10k/(RSET PH)
where PH = 3, 4, 5, 6, 7 or 8
The LTC6909 can be used in applications requiring only
one or two output phases. Alternatively, the LTC6908
family of parts provides the same two output signals but
in a smaller SOT-23 or 2mm
× 3mm DFN package. The
LTC6908-1 provides complimentary (180°) outputs while
the LTC6908-2 provides quadrature (90°) outputs.
n
1-, 2-, 3-, 4-, 5-, 6-, 7- or 8-Phase Outputs
n
One External Resistor Sets the Output Frequency
from 12.5kHz to 6.67MHz
n
Optional Spread Spectrum Frequency for Improved
EMI Performance
n
±10% Frequency Spreading
n
Outputs Can Be Held Low or Floated (Hi-Z)
n
Three Spread Spectrum Modulation Rates
fOUT/16, fOUT/32 and fOUT/64
n
400A Supply Current
n
Operates from a Single 2.7V to 5.5V Supply
n
Fast Start-Up Time
n
First Cycle Accurate
n
Outputs Are High Impedance Until Frequency Settles
n
MS16 Package
typicAl ApplicAtion
FeAtures
Description
Providing a 4-Phase Synchronizing Clock to LTM Modules
LTC6909
10V TO 14V
0.1F
71.5k
0.1F
0.01F
ENABLE SSFM
DISABLE SSFM
LTM4601
INTVCC
LTM4601-1
TRACKING
S0FT-START
1.5V
48A
TRACKING
6909 TA01
V+D
GND
V+A
SET
PH0
PH1
PH2
MOD
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
FREQUENCY
(FUNDAMENTAL AND HARMONICS SHOWN)
150kHz
OUTPUT
(dBc)
OUTPUT
(dBc)
–20
–10
0
6909 TA01b
–30
–40
–50
30MHz
–20
–10
0
–30
–40
–50
SSFM DISABLED
SSFM ENABLED
SSFM = fOUT/32
150kHz to 30MHz Output
Frequency Spectrum
(9kHz Res BW)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC6909CMS-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
| LTC6909HMS#PBF | 功能描述:IC OSC SILICON 6.67MHZ 16-MSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 標準包裝:3,000 系列:- 類型:振蕩器 - 晶體 計數:- 頻率:- 電源電壓:2.3 V ~ 5.5 V 電流 - 電源:1.07mA 工作溫度:-30°C ~ 80°C 封裝/外殼:SOT-665 包裝:帶卷 (TR) 供應商設備封裝:SS迷你型-5D 安裝類型:表面貼裝 其它名稱:AN8955SSMTXLTR |
| LTC6909HMS#TRPBF | 功能描述:IC OSC SILICON 6.67MHZ 16-MSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:45 系列:- 類型:溫度 - 補償晶體振蕩器（TCXO） 計數:- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應商設備封裝:16-SOIC W 安裝類型:表面貼裝 |
| LTC6909HMS-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
| LTC6909HMS-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
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