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LT8609

更新时间： 2024-01-12 18:50:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
38页 1840K
描述
42V, Low IQ, Quad Output Triple Monolithic Buck Converter and Boost Controller

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LT8609 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：LQFN-16
针数：16Reach Compliance Code：compliant
风险等级：8.51Base Number Matches：1

LT8609 数据手册

 浏览型号LT8609的Datasheet PDF文件第2页浏览型号LT8609的Datasheet PDF文件第3页浏览型号LT8609的Datasheet PDF文件第4页浏览型号LT8609的Datasheet PDF文件第5页浏览型号LT8609的Datasheet PDF文件第6页浏览型号LT8609的Datasheet PDF文件第7页 
LT8603  
42V, Low I , Quad Output Triple Monolithic  
Q
Buck Converter and Boost Controller  
FEATURES  
DESCRIPTION  
The LT®8603 is a highly flexible, quad output regulator  
combining two high input voltage capable monolithic  
step-down switching regulators, one low input voltage  
capable monolithic step-down regulator, and a boost  
controller to satisfy a wide range of applications while  
occupying minimal board space.  
n
Flexible Power Supply System Capable of Four  
Regulated Outputs with V  
<< V  
BATT  
OUT  
n
n
Two High Voltage Synchronous Buck Regulators  
n
3V to 42V Input Voltage Range  
n
Output Currents Up to 2.5A and 1.5A  
One Low Voltage Synchronous Buck Regulator  
n
2.6V to 5.5V Input Voltage Range  
Output Currents Up to 1.8A  
With the boost controller configured to supply the chip  
n
V supply, the LT8603 produces three precisely regulated  
IN  
n
n
One Boost Controller Allows Buck Converters to  
outputs even when the boost input voltage falls signifi-  
cantly below the regulated output voltages, such as dur-  
ing an automotive cold crank scenario. Alternatively, with  
the boost controller driven from one of the step-down  
regulator outputs or configured as a SEPIC, the LT8603  
provides four precisely regulated outputs over a wide  
input voltage range.  
Regulate with V  
<< V  
BATT  
OUT  
Selectable Burst Mode® Operation Allows Low  
28µA I with High Voltage Channels Active  
Programmable Power-On Reset  
Q
n
n
n
n
Individual Channel Power Good Indicators  
Step-Down Switching Frequency: 250kHz to 2.2MHz  
Available in 40-Lead QFN (6mm × 6mm) Package  
The LT8603 provides robust regulation by including a  
cycle-by-cycle current limit for all step-down regulators,  
thermal shutdown, and a boost controller that can tolerate  
reverse battery connections and negative transient input  
voltages down to –42V.  
APPLICATIONS  
n
Automotive Stop-Start and Cold Crank Ride Through  
Last-Gasp CPU Power Hold-Up  
n
n
Industrial Controls and Power Supplies  
All registered trademarks and trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
LT8603 Response to a Cold Crank  
Automotive Input Waveform  
Cold Crank Tolerant Automotive Triple Output Supply  
ꢇ
ꢌꢁꢀꢀ  
ꢄꢅꢀꢆ  
ꢊꢇ ꢀꢄ ꢆꢊꢇ  
ꢔꢌꢄꢄꢕꢀ  
8ꢇ ꢈꢄꢉ  
ꢊꢇ ꢋ ꢇ  
ꢋ 8ꢍꢎꢇ  
ꢌꢁꢀꢀ  
ꢕꢀꢁꢉꢀꢖꢅꢒ  
ꢁꢌꢄꢇꢓ ꢆꢍ3ꢇꢗ  
ꢓꢐꢚꢅꢇꢘꢄ  
ꢇ
ꢙꢐ  
ꢒꢇ  
ꢒꢇ ꢙꢕꢒꢆ  
ꢙꢐꢊ  
ꢙꢕꢐꢆ  
ꢙꢐꢂ  
ꢀ
ꢀ
ꢁꢂꢃꢃ  
ꢄꢅꢃꢆ  
ꢏꢁꢀꢓꢆ  
ꢙꢐꢀꢇ  
ꢙꢐꢀꢇ  
ꢟꢟꢆ  
ꢟꢟ  
ꢈꢌꢆ  
ꢈꢕꢓꢘꢆꢁ  
ꢈꢕꢓꢘꢆꢌ  
ꢉꢀ  
ꢌꢕꢀꢂ  
ꢕꢜꢂ  
ꢄꢅꢀꢂ  
ꢎ ꢛ ꢂꢍꢎꢁ  
ꢕꢠꢐꢟ  
ꢀꢁꢂꢃꢄꢅꢆ  
ꢇꢀꢈꢉꢊꢀ  
ꢟꢒꢄꢉ  
ꢊ
ꢆ
ꢘꢀ8603  
ꢈꢌꢂ  
ꢀ
ꢀ
ꢄꢅꢃꢇ  
ꢀꢉꢞꢕꢕꢂꢖꢊ  
ꢌꢕꢀꢊ  
ꢄꢅꢃꢈ  
ꢒꢇ  
ꢙꢐ3  
ꢄꢅꢀꢊ  
3ꢍ3 ꢛ  
ꢕꢜꢊ  
ꢉꢅꢐ3  
ꢌꢙꢁꢕ  
ꢊꢍꢎꢁ ꢝ ꢙ  
ꢒꢇꢙꢐ3  
ꢀ
ꢄꢅꢃ3  
ꢈꢌꢊ  
ꢄꢅꢀꢊ  
0ꢀ  
ꢒꢏꢂꢖꢆ  
ꢒꢏꢂꢖꢆ  
ꢄꢅꢀ3  
ꢂꢍꢊ ꢛ ꢂꢍ8ꢁ  
ꢕꢜ3  
ꢒꢄꢉꢓꢐ  
ꢒꢄꢉꢓꢐ  
8603 ꢀꢁ0ꢂꢃ  
RESET  
RST  
ꢈꢌ3  
8603 ꢀꢁ0ꢂꢃ  
ꢀꢁꢂꢃ ꢄꢅ0ꢆꢇꢈꢉꢁꢊꢋ  
ꢏꢐꢑ  
8603f  
1
For more information www.linear.com/LT8603  
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