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LTC3649IUFD#PBF

更新时间： 2024-01-13 23:49:23
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
26页 487K
描述
LTC3649 - 60V, 4A Synchronous Step-Down Regulator with Rail-to-Rail Programmable Output; Package: QFN; Pins: 28; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3649IUFD#PBF 技术参数

是否Rohs认证： 符合生命周期：Active
零件包装代码：QFN针数：28
Reach Compliance Code：compliant风险等级：2.29
Base Number Matches：1

LTC3649IUFD#PBF 数据手册

 浏览型号LTC3649IUFD#PBF的Datasheet PDF文件第2页浏览型号LTC3649IUFD#PBF的Datasheet PDF文件第3页浏览型号LTC3649IUFD#PBF的Datasheet PDF文件第4页浏览型号LTC3649IUFD#PBF的Datasheet PDF文件第5页浏览型号LTC3649IUFD#PBF的Datasheet PDF文件第6页浏览型号LTC3649IUFD#PBF的Datasheet PDF文件第7页 
LTC3649  
60V, 4A Synchronous  
Step-Down Regulator with  
Rail-to-Rail Programmable Output  
DESCRIPTION  
FEATURES  
Wide V Range: 3.1V to 60V  
The LTC®3649 is a high efficiency 60V, 4A synchronous  
monolithic step-down regulator. The regulator features  
a single resistor programmable output voltage, internal  
n
IN  
n
Wide V  
Range: 0V to (V – 0.5V)  
OUT  
IN  
n
n
Single Resistor V  
Programming  
OUT  
Integrated 110mΩ Top N-Channel/50mΩ Bottom  
compensationandhighefficienciesoverawideV range.  
OUT  
N-Channel MOSFETs  
The step-down regulator operates from an input voltage  
rangeof3.1Vto60Vandprovidesanadjustablerail-to-rail  
n
n
n
95% Efficiency with 12V and 5V  
IN  
OUT  
Q
Regulated I : 440µA, Shutdown I : 18µA  
Q
output range from (V – 0.5V) to ground while delivering  
IN  
Accurate Current Monitoring ( 4%) without Sense  
up to 4A of output current. The switching frequency is  
also adjusted with an external resistor. A user-selectable  
mode input is provided to allow the user to trade off ripple  
noise for efficiency at light loads; Burst Mode operation  
provides the highest efficiency at light loads, while forced  
continuous mode provides low output ripple. The MODE/  
SYNCpincanalsobeusedtoallowtheusertosynchronize  
the switching frequency to an external clock.  
Resistor  
n
Accurate Resistor Programmable Frequency  
(300kHz to 3MHz) with 50% Frequency Sync Range  
Accurate Programmable Output Current  
Input Voltage Regulation for MPPT Applications  
0.ꢀ8 Output Voltage Accuracy  
n
n
n
n
n
n
n
n
n
Peak Current Mode Operation  
Programmable Wire Drop Compensation  
Burst Mode® Operation, Forced Continuous Mode  
Internal Compensation and Programmable Soft-Start  
Overtemperature Protection  
Available in Thermally Enhanced 2ꢀ-Lead (4mm ×  
5mm) QFN and TSSOP Packages  
The LTC3649 operates with a peak current mode architec-  
ture that allows for fast transient response with inherent  
cycle-to-cycle current limit protection. It also features  
programmable output current limit, current monitoring  
and input voltage regulation.  
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and OPTI-LOOP are  
registered trademarks of Analog Devices, Inc. All other trademarks are the property of their  
respective owners. Protected by U.S. Patents, including 54ꢀ117ꢀ, 5705919, 5ꢀ47554, 65ꢀ025ꢀ.  
APPLICATIONS  
n
Industrial Applications  
n
Automotive Applications  
TYPICAL APPLICATION  
Efficiency with VOUT = 5V  
100  
24V to 5VOUT Burst Mode Operation  
V
V
= 12V  
= 24V  
IN  
IN  
98  
96  
94  
92  
90  
88  
86  
84  
82  
80  
0.1µF  
6.8µH  
V
IN  
V
BOOST SW  
IN  
5.5V TO 60V  
V
5V  
4A  
OUT  
RUN  
V
OUT  
47µF  
×2  
22µF  
LTC3649  
EXTV  
CC  
ITH  
V
MODE/SYNC  
SGND  
INREG  
CC  
INTV  
PGND  
R
2.2µF  
ISET  
IMON  
T
10nF  
10nF  
100k  
200k  
10k  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
4
I
(A)  
OUT  
3649 TA01b  
f
= 500kHz  
3649 TA01a  
SW  
3649fb  
1
For more information www.linear.com/LTC3649  
1234567...26

中文翻译

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LTC3649IUFD#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3649EUFD#PBF Linear

完全替代

 LTC3649 - 60V, 4A Synchronous Step-Down Regulator with Rail-to-Rail Programmable Output; P

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