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LTC3829EFE-TRPBF PDF预览

LTC3829EFE-TRPBF

更新时间: 2024-11-09 11:50:47
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
40页 501K
描述
3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp

LTC3829EFE-TRPBF 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  
n
Optional Nonlinear Control for Fast Response  
n
±±0.75% ±0ꢀ6 Referenꢁe ꢂꢁꢁcraꢁꢃ  
PWM% Stage Shedding™ or Bcrst Mode® Operation  
High Effiꢁienꢁꢃ: Up to 975  
n
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  
operating the three controller output stages out of phase.  
n
n
n
n
n
n
n
n
n
n
n
n
n
R
or DCR Ccrrent Sensing  
SENSE  
Programmable DCR Temperatcre Compensation  
Phase-Loꢁkable Fixed Freqcenꢁꢃ: 27±kHz to ..±kHz  
Trce Remote Sense Differential ꢂmplifier  
The LTC3829 can be configured for 6-phase operation,  
has DCR temperature compensation, and output foldback  
current limiting. This device features a precision 0.6V  
reference and a power good indicator.  
Programmable Active Voltage Positioning (AVP)  
Triple N-Channel MOSFET Synchronous Drive  
Wide V Range: 4.5V to 38V Operation  
IN  
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  
OUT  
38-Pin (5mm × 7mm) QFN and FE Packages  
The LTC3829 is available in both low profile 38-pin 5mm  
× 7mm QFN and Exposed Pad FE packages.  
applicaTions  
n
Notebook and Palmtop Computers  
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, PolyPhase, Linear Technology, the Linear logo are  
registered trademarks and Stage Shedding, No R  
are trademarks of Linear Technology  
SENSE  
n
Telecom Systems  
Corporation. All other trademarks are the property of their respective owners. Protected by  
U.S. Patents, including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 6498466,  
6674274, 6611136.  
n
Portable Instruments  
n
DC Power Distribution Systems  
Typical applicaTion  
V
IN  
6V TO 28V  
+
22µF  
35V  
s3  
V
IN  
INTV  
TG1  
SW1  
CC  
0.6µH  
0.002Ω  
0.002Ω  
0.002Ω  
4.7µF  
BG1  
Effiꢁienꢁꢃ  
BOOST1  
BOOST2  
BOOST3  
PGND  
100  
95  
16  
14  
12  
10  
8
V
V
= 12V  
IN  
OUT  
+
SENSE1  
SENSE1  
= 1.5V  
V
V
90  
IN  
SW3 SW2 SW1  
680pF  
TG2  
SW2  
BG2  
85  
0.6µH  
V
OUT  
1.2V  
50A  
100k  
EFFICIENCY  
FREQ  
80  
75  
LTC3829  
I
TH  
70  
65  
60  
55  
50  
6
TK/SS  
+
SENSE2  
SENSE2  
5k  
0.1µF  
POWER LOSS  
10  
4
SGND  
IN  
0.6µH  
DIFFOUT  
TG3  
SW3  
BG3  
2
20k  
20k  
0
100  
0.1  
1
V
FB  
LOAD CURRENT (A)  
DIFFN  
DIFFP  
3829 TA01b  
+
SENSE3  
SENSE3  
C
OUT  
470µF  
+
4V  
s4  
3829 TA01  
3829f  

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