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LTC3807EUDC#PBF PDF预览

LTC3807EUDC#PBF

更新时间： 2024-11-23 19:38:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
34页 546K
描述
LTC3807 - Low IQ, Synchronous Step-Down Controller with 24V Output Voltage Capability; Package: QFN; Pins: 20; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3807EUDC#PBF 技术参数

是否Rohs认证： 符合生命周期：Active
零件包装代码：QFN包装说明：3 X 4 MM, LEAD FREE, PLASTIC, QFN-20
针数：20Reach Compliance Code：compliant
风险等级：2.23Base Number Matches：1

LTC3807EUDC#PBF 数据手册

 浏览型号LTC3807EUDC#PBF的Datasheet PDF文件第2页浏览型号LTC3807EUDC#PBF的Datasheet PDF文件第3页浏览型号LTC3807EUDC#PBF的Datasheet PDF文件第4页浏览型号LTC3807EUDC#PBF的Datasheet PDF文件第5页浏览型号LTC3807EUDC#PBF的Datasheet PDF文件第6页浏览型号LTC3807EUDC#PBF的Datasheet PDF文件第7页 
LTC3807  
Low I , Synchronous  
Q
Step-Down Controller with 24V  
Output Voltage Capability  
FEATURES  
DESCRIPTION  
TheLTC®3807isahighperformancestep-downswitching  
regulator DC/DC controller that drives an all N-channel  
synchronous power MOSFET stage. A constant fre-  
quencycurrentmodearchitectureallowsaphase-lockable  
frequency of up to 750kHz.  
n
Wide V Range: 4V to 38V (40V Abs Max)  
IN  
n
Low Operating I : 50μA  
Q
n
Wide Output Voltage Range: 0.8V ≤ V  
≤ 24V  
OUT  
n
n
n
n
R
SENSE  
or DCR Current Sensing  
Phase-Lockable Frequency (75kHz to 750kHz)  
Programmable Fixed Frequency (50kHz to 900kHz)  
The50μAno-loadquiescentcurrentextendsoperatingrun  
Selectable Continuous, Pulse-Skipping or Low Ripple  
Burst Mode® Operation at Light Load  
Selectable Current Limit  
timeinbattery-poweredsystems.OPTI-LOOP® compensa-  
tion allows the transient response to be optimized over  
a wide range of output capacitance and ESR values. The  
LTC3807 features a precision 0.8V reference and power  
goodoutputindicator. Awide4Vto38Vinputsupplyrange  
encompasses a wide range of intermediate bus voltages  
andbatterychemistries. TheoutputvoltageoftheLTC3807  
can be programmed between 0.8V to 24V.  
n
n
n
n
n
n
n
n
n
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Power Good Output Voltage Monitor  
Output Overvoltage Protection  
Low Shutdown I : 14μA  
Q
Internal LDO Powers Gate Drive from V or EXTV  
IN  
CC  
The TRACK/SS pin ramps the output voltages during  
start-up. Current foldback limits MOSFET heat dissipation  
during short-circuit conditions. The PLLIN/MODE pin se-  
lects among Burst Mode operation, pulse-skipping mode,  
or continuous conduction mode at light loads.  
L, LT, LTC, LTM, OPTI-LOOP, Burst Mode, Linear Technology and the Linear logo are registered  
trademarks of Linear Technology Corporation. All other trademarks are the property of their  
respective owners. Patents, including 5481178, 5705919, 6611131, 6498466, 6580258,  
7230497.  
No Current Foldback During Start-Up  
Small 20-Pin 3mm × 4mm QFN and TSSOP Packages  
APPLICATIONS  
n
Automotive Always-On Systems  
n
Battery Powered Digital Devices  
n
Distributed DC Power Systems  
TYPICAL APPLICATION  
Efficiency and Power Loss vs  
Output Current  
High Efficiency 12V/10A Step-Down Converter  
V
IN  
12.5V TO 38V  
10  
100  
90  
80  
70  
60  
50  
40  
30  
20  
V
V
= 24V  
IN  
OUT  
22µF  
= 12V  
V
IN  
INTV  
CC  
EFFICIENCY  
2.2µF  
1
LTC3807  
TG  
60.4k  
47pF  
FREQ  
ITH  
0.1µF  
0.1  
0.01  
0.001  
4.7nF  
BOOST  
SW  
POWER LOSS  
10µH  
15.4k  
0.1µF  
4mΩ  
V
12V  
10A  
OUT  
150µF  
BG  
PGND  
10  
0
TRACK/SS  
EXTV  
+
SENSE  
V
OUT  
CC  
SGND  
–
0.0001 0.001  
0.01  
I
0.1  
(A)  
1
10  
100k  
SENSE  
OUT  
3807 TA01b  
V
FB  
FIGURE 13 CIRCUIT  
Burst Mode OPERATION  
100k  
INTV  
PGOOD  
CC  
6.98k  
3807 TA01a  
3807fa  
1
For more information www.linear.com/LTC3807  
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中文翻译

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LTC3807EUDC#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LM5141QRGETQ1 TI

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