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LT3724 PDF预览

LT3724

更新时间: 2024-09-15 14:58:15
品牌 Logo 应用领域
亚德诺 - ADI 开关控制器
页数 文件大小 规格书
26页 314K
描述
高电压、电流模式开关稳压控制器

LT3724 数据手册

 浏览型号LT3724的Datasheet PDF文件第2页浏览型号LT3724的Datasheet PDF文件第3页浏览型号LT3724的Datasheet PDF文件第4页浏览型号LT3724的Datasheet PDF文件第5页浏览型号LT3724的Datasheet PDF文件第6页浏览型号LT3724的Datasheet PDF文件第7页 
LT3724  
High Voltage, Current Mode  
Switching Regulator Controller  
FEATURES  
DESCRIPTION  
TheLT®3724isaDC/DCcontrollerusedformediumpower,  
low part count, low cost, high efficiency supplies. It of-  
fers a wide 4V-60V input range (7.5V minimum startup  
voltage)andcanimplementstep-down, step-up, inverting  
and SEPIC topologies.  
n
Wide Input Range: 4V to 60V  
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Output Voltages up to 36V (Step-Down)  
Burst Mode® Operation: <100µA Supply Current  
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10µA Shutdown Supply Current  
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1.3ꢀ ꢁeference Accuracy  
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200kHz Fixed Frequency  
The LT3724 includes Burst Mode operation, which re-  
duces quiescent current below 100µA and maintains  
high efficiency at light loads. An internal high voltage bias  
regulator allows for simple biasing and can be back driven  
to increase efficiency.  
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Drives N-Channel MOSFET  
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Programmable Soft-Start  
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Programmable Undervoltage Lockout  
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Internal High Voltage ꢁegulator for Gate Drive  
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Thermal Shutdown  
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Additional features include fixed frequency current mode  
controlforfastlineandloadtransientresponse;agatedriver  
capable of driving large N-channel MOSFETs; a precision  
undervoltage lockout function; 10µA shutdown current;  
short-circuit protection; and a programmable soft-start  
function that directly controls output voltage slew rates at  
startup which limits inrush current, minimizes overshoot  
and facilitates supply sequencing.  
Current Limit Unaffected by Duty Cycle  
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16-Pin Thermally Enhanced TSSOP Package  
APPLICATIONS  
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Industrial Power Distribution  
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12V and 42V Automotive and Heavy Equipment  
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High Voltage Single Board Systems  
Distributed Power Systems  
Avionics  
Telecom Power  
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
Burst Mode is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners. Protected by U.S. Patents including 5731694, 6498466, 6611131.  
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TYPICAL APPLICATION  
High Voltage Step-Down Regulator  
Efficiency and Power Loss  
vs Load Current  
V
IN  
30V TO  
60V  
C
95  
90  
85  
80  
75  
70  
65  
12  
10  
8
V
IN  
BOOST  
TG  
IN  
68µF  
0.22µF  
EFFICIENCY  
1M  
Si7852  
LT3724  
0.025  
10Ω  
V
OUT  
SHDN  
SW  
24V  
47µH  
75W  
68.1k  
200k  
SS3H9  
+
6
C
C
SS  
OUT  
330µF  
Burst_EN  
V
4
CC  
1µF  
LOSS  
V
FB  
V
C
PGND  
2
40.2k  
V
= 48V  
IN  
+
SENSE  
0
10  
680pF  
120pF  
1000pF  
0.1  
1
SGND  
SENSE  
LOAD CURRENT (A)  
4.99k  
93.1k  
3724 TA01b  
3724 TA01a  
3724fd  
1

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