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LTC3115-1

更新时间： 2024-09-26 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
42页 2260K
描述
40V、2A、同步降压-升压型 DC/DC 转换器

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中文翻译

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LTC3115-1 数据手册

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LTC3115-1  
40V, 2A Synchronous  
Buck-Boost DC/DC  
Converter  
FEATURES  
DESCRIPTION  
The LTC®3115-1 is a high voltage monolithic synchronous  
buck-boost DC/DC converter. Its wide 2.7V to 40V input  
and output voltage ranges make it well suited to a wide  
variety of automotive and industrial applications. A propri-  
etary low noise switching algorithm optimizes efficiency  
with input voltages that are above, below or even equal  
to the output voltage and ensures seamless transitions  
between operational modes.  
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Wide V Range: 2.7V to 40V  
IN  
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Wide V  
Range: 2.7V to 40V  
OUT  
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1A Output Current for V ≥ 3.6V, V  
= 5V  
IN  
OUT  
2A Output Current in Step-Down Operation  
for V ≥ 6V  
IN  
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Programmable Frequency: 100kHz to 2MHz  
Synchronizable Up to 2MHz with an External Clock  
Up to 95% Efficiency  
30µA No-Load Quiescent Current in Burst Mode®  
Operation  
Programmable frequency PWM mode operation pro-  
vides low noise, high efficiency operation and the ability  
to synchronize switching to an external clock. Switching  
frequencies up to 2MHz are supported to allow use of  
small value inductors for miniaturization of the appli-  
cation circuit. Pin selectable Burst Mode operation  
reduces standby current and improves light load effi-  
ciency which, combined with a 3µA shutdown current,  
make the LTC3115-1 ideally suited for battery-powered  
applications. Additional features include output discon-  
nect in shutdown, short-circuit protection and inter-  
nal soft-start. The LTC3115-1 is available in thermally  
enhanced 16-lead 4mm × 5mm × 0.75mm DFN and  
20-lead TSSOP packages.  
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Ultralow Noise Buck-Boost PWM  
Internal Soft-Start  
3µA Supply Current in Shutdown  
Programmable Input Undervoltage Lockout  
Small 4mm × 5mm × 0.75mm DFN Package  
Thermally Enhanced 20-Lead TSSOP Package  
AEC-Q100 Qualified for Automotive Applications  
APPLICATIONS  
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24V/28V Industrial Applications  
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Automotive Power Systems  
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Telecom, Servers and Networking Equipment  
FireWire Regulator  
Multiple Power Source Supplies  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. Patents including 6404251, 6166527 and others pending.  
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TYPICAL APPLICATION  
Efficiency vs VIN  
10µH  
ꢐꢑ  
ꢀ
ꢛ ꢒ.ꢑꢈ  
ꢇꢆꢈꢚ  
0.1µF  
0.1µF  
ꢐꢒ  
ꢓꢑ  
ꢓꢒ  
ꢗꢑ  
ꢗꢒ  
BST1 SW1  
PV  
SW2 BST2  
PV  
ꢀ
ꢛ ꢕꢈ  
5V  
ꢇꢆꢈꢚ  
2.7V TO  
40V  
1A V > 3.6V  
OUT  
IN  
IN  
2A V ≥ 6V  
IN  
4.7µF  
47µF  
V
IN  
33pF  
15k  
1M  
LTC3115-1  
3300pF  
60.4k  
BURST PWM  
OFF ON  
PWM/SYNC  
RUN  
VC  
FB  
PV  
V
249k  
CC  
CC  
RT  
GND  
PGND  
47.5k  
4.7µF  
(OPTIONAL)  
ꢅ
ꢛ ꢑꢅ  
ꢆꢃꢄ  
ꢘꢒ  
ꢔꢕꢕꢑꢕ ꢄꢈꢒꢕꢖ  
ꢙ
ꢕꢒ  
ꢀꢁꢂꢃꢄ ꢅꢆꢇꢄꢈꢉE ꢊꢅꢋ  
3115 TA01a  
Rev. E  
1
Document Feedback  
For more information www.analog.com  
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中文翻译

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