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LT3724IFE PDF预览

LT3724IFE

更新时间: 2024-09-14 22:16:07
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 240K
描述
High Voltage, Current Mode Switching Regulator Controller

LT3724IFE 数据手册

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LT3724  
High Voltage, Current Mode  
Switching Regulator Controller  
U
FEATURES  
DESCRIPTIO  
The LT®3724 is a DC/DC controller used for medium  
power, low part count, low cost, high efficiency supplies.  
Itoffersawide4V-60Vinputrange(7.5Vminimumstartup  
voltage)andcanimplementstep-down, step-up, inverting  
and SEPIC topologies.  
Wide Input Range: 4V to 60V  
Output Voltages up to 36V (Step-Down)  
Burst Mode® Operation: <100µA Supply Current  
<10µA Shutdown Supply Current  
±1.3% Reference Accuracy  
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.  
Drives N-Channel MOSFET  
Programmable Soft-Start  
Programmable Undervoltage Lockout  
Internal High Voltage Regulator for Gate Drive  
Thermal Shutdown  
Additional features include fixed frequency current mode  
control for fast line and load transient response; a gate  
driver 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, mini-  
mizes overshoot and facilitates supply sequencing.  
Current Limit Unaffected by Duty Cycle  
16-Pin Thermally Enhanced TSSOP Package  
U
APPLICATIO S  
Industrial Power Distribution  
12V and 42V Automotive and Heavy Equipment  
High Voltage Single Board Systems  
Distributed Power Systems  
Avionics  
Telecom Power  
The LT3724 is available in a 16-lead thermally enhanced  
TSSOP package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 5731694, 6498466, 6611131.  
U
TYPICAL APPLICATIO  
Efficiency and Power Loss  
vs Load Current  
High Voltage Step-Down Regulator  
V
IN  
30V TO  
60V  
C
95  
90  
85  
80  
75  
70  
65  
12  
10  
8
V
BOOST  
TG  
IN  
68µF  
IN  
0.22µF  
1M  
Si7852  
EFFICIENCY  
LT3724  
0.025  
V
OUT  
SHDN  
SW  
24V  
47µH  
75W  
68.1k  
200k  
SS3H9  
+
C
C
SS  
6
OUT  
330µF  
Burst_EN  
V
CC  
4
1µF  
V
PGND  
LOSS  
FB  
2
40.2k  
+
V
C
SENSE  
V
= 48V  
IN  
680pF  
120pF  
1000pF  
0
10  
SGND  
SENSE  
0.1  
1
4.99k  
93.1k  
LOAD CURRENT (A)  
3724 TA01a  
3724 TA01b  
3724f  
1

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