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LTC3829EFE#WPBF

更新时间： 2024-11-07 20:44:07
品牌 Logo 应用领域
亚德诺 - ADI 开关光电二极管
页数 文件大小 规格书
40页 937K
描述
3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp

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LTC3829EFE#WPBF 数据手册

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LTC3829  
3-Phase, Single Output Synchronous  
Step-Down DC/DC Controller with Diffamp  
FEATURES  
DESCRIPTION  
TheLTC®3829isahighperformance3-phasesingleoutput  
synchronous step-down DC/DC switching controller that  
drives all N-channel synchronous power MOSFET stages.  
A constant frequency current mode architecture allows a  
phase-lockablefrequencyofupto770kHz.Powerlossand  
noise due to ESR of the input capacitors are minimized by  
n
Optional Nonlinear Control for Fast Response  
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
0.75%, 0.6V Reference Accuracy  
PWM, Stage Shedding™ or Burst Mode® Operation  
High Efficiency: Up to 95%  
R
or DCR Current Sensing  
SENSE  
Programmable DCR Temperature Compensation  
Phase-Lockable Fixed Frequency: 250kHz to 770kHz operating the three controller output stages out of phase.  
True Remote Sense Differential Amplifier  
The LTC3829 can be configured for 6-phase operation,  
Programmable Active Voltage Positioning (AVP)  
has DCR temperature compensation, and output foldback  
Triple N-Channel MOSFET Synchronous Drive  
current limiting. This device features a precision 0.6V ref-  
Wide V Range: 4.5V to 38V Operation  
IN  
erence and a power good indicator.  
V
V
Range: 0.6V to 5V without Diffamp  
Range: 0.6V to 3.3V with Diffamp  
OUT  
OUT  
Light load efficiency is optimized by using a choice of  
output Stage Shedding or Burst Mode operation. A dif-  
ferential amplifier provides true remote sensing of the  
output voltage at the point of load.  
Clock Input and Output for 6-Phase Operation  
Adjustable Soft-Start or V Tracking  
38-Pin (5mm × 7mm) QFN and FE Packages  
AEC-Q100 Qualified for Automotive Applications  
OUT  
The LTC3829 is available in both low profile 38-pin 5mm  
× 7mm QFN and Exposed Pad FE packages.  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. Patents, including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258,  
6498466, 6674274, 6611136.  
APPLICATIONS  
n
Notebook and Palmtop Computers  
n
Telecom Systems  
n
DC Power Distribution Systems  
TYPICAL APPLICATION  
V
IN  
6V TO 28V  
+
22µF  
35V  
×3  
V
IN  
INTV  
TG1  
SW1  
CC  
0.6µH  
0.002Ω  
0.002Ω  
0.002Ω  
4.7µF  
Efficiency  
BG1  
BOOST1  
BOOST2  
BOOST3  
PGND  
ꢋꢊꢊ  
ꢖꢔ  
ꢋꢚ  
ꢋꢛ  
ꢋꢘ  
ꢋꢊ  
ꢕ
ꢜ
ꢜ
ꢝ ꢋꢘꢜ  
ꢎꢆ  
ꢁꢅꢇ  
+
–
SENSE1  
SENSE1  
ꢝ ꢋ.ꢔꢜ  
V
V
ꢖꢊ  
IN  
SW3 SW2 SW1  
680pF  
TG2  
SW2  
BG2  
ꢕꢔ  
0.6µH  
V
OUT  
1.2V  
50A  
100k  
EꢍꢍꢎꢄꢎEꢆꢄꢏ  
FREQ  
ꢕꢊ  
ꢌꢔ  
LTC3829  
I
TH  
ꢌꢊ  
ꢚꢔ  
ꢚꢊ  
ꢔꢔ  
ꢔꢊ  
ꢚ
TK/SS  
+
–
SENSE2  
SENSE2  
5k  
0.1µF  
ꢑꢁꢒER ꢀꢁꢓꢓ  
ꢋꢊ  
ꢛ
SGND  
IN  
0.6µH  
DIFFOUT  
TG3  
SW3  
BG3  
ꢘ
20k  
20k  
ꢊ
ꢋꢊꢊ  
ꢊ.ꢋ  
ꢋ
V
FB  
ꢀꢁꢂꢃ ꢄꢅRREꢆꢇ ꢈꢂꢉ  
DIFFN  
DIFFP  
ꢗꢕꢘꢖ ꢇꢂꢊꢋꢙ  
+
–
SENSE3  
SENSE3  
C
OUT  
470µF  
+
4V  
×4  
3829 TA01  
Rev. E  
1
Document Feedback  
For more information www.analog.com  
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