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LTC3415EUHF-TRPBF

更新时间： 2024-09-23 05:43:51
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
28页 312K
描述
7A, PolyPhase Synchronous Step-Down Regulator

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中文翻译

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LTC3415EUHF-TRPBF 数据手册

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LTC3415  
7A, PolyPhase  
Synchronous Step-Down  
Regulator  
FEATURES  
DESCRIPTION  
TheLTC®3415isahighefficiency,monolithicsynchronous  
buckregulatorusingaphaselockableconstantfrequency,  
current mode architecture. PolyPhase® operation allows  
multiple LTC3415s to run out of phase while using mini-  
mal input and output capacitance. The operating supply  
range is from 5.5V down to 2.5V, making it suitable for  
single Lithium-Ion battery as well as point of load power  
supply applications. Burst Mode operation provides high  
efficiency at low load currents. 100% duty cycle provides  
low dropout operation that extends operating time in bat-  
tery-operated systems.  
n
High Efficiency: Up to 96%  
7A Output Current at V = 3V  
n
IN  
n
n
n
n
n
n
n
n
n
n
n
Adjustable Frequency: 1.5MHz Nominal  
PolyPhase Operation (Up to 12 Phases)  
Spread Spectrum Frequency Modulation  
Output Tracking and Margining  
1% ꢀeference Accuracy  
2.5V to 5.5V V Range  
IN  
Phase Lockable from 0.75MHz to 2.25MHz  
Selectable Burst Mode® Operation  
Low Dropout Operation: 100% Duty Cycle  
Low Quiescent Current: 450μA  
Current Mode Operation for Excellent Line and Load  
Transient Response  
Shutdown Mode Draws Only 0.2μA Supply Current  
Available in 38-Pin (5mm × 7mm) QFN Package  
The operating frequency is internally set at 1.5MHz, al-  
lowing the use of small surface mount inductors. For  
switching-noisesensitiveapplications, itcanbeexternally  
synchronized from 0.75MHz to 2.25MHz. The PHMODE  
pin allows user control of the phase of the outgoing clock  
signal. The current sense comparator is factory trimmed  
foraccurateoutputcurrentsharing. BurstModeoperation  
is inhibited during synchronization or when the MODE pin  
is pulled low to reduce noise and RF interference.  
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APPLICATIONS  
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Point of Load Power Supply  
n
Portable Instruments  
, LT, LTC, LTM, Burst Mode and PolyPhase are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 5481178, 6580258, 6304066, 6127815, 6498466,  
6611131.  
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Distributed Power Systems  
Battery-Powered Equipment  
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TYPICAL APPLICATION  
V
IN  
, 2.5V to 5.5V  
Efficiency and Power Loss  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
22μF  
x3  
SV  
PV  
IN  
IN  
CLKIN  
SW  
SW  
SW  
SW  
SW  
EFFICIENCY  
CLKOUT  
PHMODE  
PLLLPF  
RUN  
1
V
OUT  
1.8V  
0.1  
0.01  
0.001  
LTC3415  
0.2μH  
47μF  
x3  
TRACK  
FB  
60k  
POWER LOSS  
MODE  
PGOOD  
2.5V  
3.3V  
5V  
I
TH  
SGND  
PGND  
0.01  
0.1  
1
10  
120k  
LOAD CURRENT (A)  
3415 TA01  
3415 TA01B  
Figure 1. High Efficiency Step-Down Converter  
3415fa  
1
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