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LT3724EFE-PBF

更新时间： 2024-09-14 05:43:35
品牌 Logo 应用领域
凌特 - Linear 开关控制器
页数 文件大小 规格书
24页 293K
描述
High Voltage, Current Mode Switching Regulator Controller

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LT3724EFE-PBF 数据手册

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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  
n
Output Voltages up to 36V (Step-Down)  
Burst Mode® Operation: <100μA Supply Current  
n
n
10μA Shutdown Supply Current  
n
1.3ꢀ ꢁeference Accuracy  
n
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.  
n
Drives N-Channel MOSFET  
n
Programmable Soft-Start  
n
Programmable Undervoltage Lockout  
n
Internal High Voltage ꢁegulator for Gate Drive  
n
Thermal Shutdown  
n
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  
n
16-Pin Thermally Enhanced TSSOP Package  
APPLICATIONS  
n
Industrial Power Distribution  
n
12V and 42V Automotive and Heavy Equipment  
n
High Voltage Single Board Systems  
Distributed Power Systems  
Avionics  
Telecom Power  
n
The LT3724 is available in a 16-lead thermally enhanced  
TSSOP package.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode is a trademark of Linear Technology Corporation.  
n
n
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 5731694, 6498466, 6611131.  
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
BOOST  
TG  
IN  
IN  
68μF  
0.22μF  
10Ω  
1M  
Si7852  
EFFICIENCY  
LT3724  
0.025Ω  
V
OUT  
SHDN  
SW  
24V  
47μH  
75W  
68.1k  
200k  
SS3H9  
+
6
C
C
SS  
OUT  
330μF  
Burst_EN  
V
CC  
4
1μF  
LOSS  
V
V
PGND  
FB  
C
2
40.2k  
V
= 48V  
+
IN  
SENSE  
0
10  
680pF  
120pF  
1000pF  
–
0.1  
1
SGND  
SENSE  
LOAD CUꢁꢁENT (A)  
4.99k  
93.1k  
3724 TA01b  
3724 TA01a  
3724fc  
1
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