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LTC3112

更新时间： 2024-11-13 12:00:39
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
28页 382K
描述
15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current

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LTC3112 数据手册

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LTC3129  
15V, 200mA Synchronous  
Buck-Boost DC/DC Converter  
with 1.3µA Quiescent Current  
FeaTures  
DescripTion  
n
Regulates V  
Above, Below or Equal to V  
The LTC®3129 is a high efficiency, 200mA buck-boost  
OUT  
IN  
n
Wide V Range: 2.42V to 15V, 1.92V to 15V After  
DC/DCconverterwithawideV andV range.Itincludes  
IN  
IN OUT  
Start-Up (Bootstrapped)  
anaccurateRUNpinthresholdtoallowpredictableregula-  
tor turn-on and a maximum power point control (MPPC)  
capability that ensures maximum power extraction from  
non-ideal power sources such as photovoltaic panels.  
n
n
n
n
n
n
n
n
n
n
n
n
n
Wide V  
Range: 1.4V to 15.75V  
OUT  
200mA Output Current in Buck Mode  
Single Inductor  
1.3µA Quiescent Current  
The LTC3129 employs an ultralow noise, 1.2MHz PWM  
switchingarchitecturethatminimizessolutionfootprintby  
allowing the use of tiny, low profile inductors and ceramic  
capacitors. Built-in loop compensation and soft-start  
simplify the design. For high efficiency operation at light  
loads, automatic Burst Mode operation can be selected,  
reducing the quiescent current to just 1.3µA.  
Programmable Maximum Power Point Control  
1.2MHz Ultralow Noise PWM  
Current Mode Control  
Pin Selectable Burst Mode® Operation  
Up to 95% Efficiency  
Accurate RUN Pin Threshold  
Power Good Indicator  
10nA Shutdown Current  
Thermally Enhanced 3mm × 3mm QFN and  
16-Lead MSOP Packages  
Additionalfeaturesincludeapowergoodoutput, lessthan  
10nA of shutdown current and thermal shutdown.  
The LTC3129 is available in thermally enhanced 3mm ×  
3mm QFN and 16-lead MSOP packages. For fixed output  
voltageoptions,seethefunctionallyequivalentLTC3129-1,  
which eliminates the need for an external feedback divider.  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
applicaTions  
n
Industrial Wireless Sensor Nodes  
n
Post-Regulator for Harvested Energy  
n
Solar Panel Post-Regulator/Charger  
n
Intrinsically Safe Power Supplies  
n
Wireless Microphones  
n
Avionics-Grade Wireless Headsets  
Typical applicaTion  
22nF  
22nF  
Efficiency and Power Loss vs Load  
10µH  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
1000  
100  
10  
5V AT 200mA, V > 5V  
IN  
EFFICIENCY  
5V AT 100mA, V < 5V  
IN  
BST1 SW1  
SW2 BST2  
2.42V TO 15V  
V
V
V
OUT  
V
IN  
IN  
OUT  
10µF  
10pF  
LTC3129  
3.32M  
RUN  
10µF  
POWER LOSS  
MPPC  
PWM  
FB  
V
1
CC  
PGOOD  
1.02M  
V
V
V
V
= 2.5V  
= 3.6V  
= 5V  
IN  
IN  
IN  
IN  
0.1  
V
CC  
= 15V  
V
= 5V  
OUT  
0.01  
2.2µF  
GND  
PGND  
0.01  
0.1  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
3129 TA01b  
3129 TA01a  
3129f  
1
For more information www.linear.com/3129  
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