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LT3693

更新时间： 2024-11-12 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 开关稳压器
页数 文件大小 规格书
24页 307K
描述
36V、3.5A、2.4MHz 降压型开关稳压器

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中文翻译

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LT3693 数据手册

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LT3693  
36V, 3.5A, 2.4MHz  
Step-Down Switching Regulator  
U
DESCRIPTIO  
FEATURES  
The LT®3693 is an adjustable frequency (200kHz to  
2.4MHz)monolithicbuckswitchingregulatorthataccepts  
■
Wide Input Range: 3.6V to 36V  
■
3.5A Maximum Output Current  
■
Adjustable Switching Frequency: 200kHz to 2.4MHz  
Low Shutdown Current: I < 1μA  
Integrated Boost Diode  
Synchronizable Between 250kHz to 2MHz  
Power Good Flag  
Saturating Switch Design: 95m On-Resistance  
0.790V Feedback Reference Voltage  
Output Voltage: 0.79V to 30V  
Thermal Protection  
input voltages up to 36V. A high efficiency 95m switch  
is included on the die along with a boost Schottky diode  
and the necessary oscillator, control, and logic circuitry.  
Current mode topology is used for fast transient response  
and good loop stability. Shutdown reduces input supply  
current to less than 1μA while a resistor and capacitor on  
the RUN/SS pin provide a controlled output voltage ramp  
■
■
■
■
■
■
■
■
■
■
Q
(soft-start). A power good flag signals when V  
reaches  
OUT  
91% of the programmed output voltage. The LT3693 is  
available in 10-Pin MSOP and 3mm × 3mm DFN packages  
with exposed pads for low thermal resistance.  
Soft-Start Capability  
Small 10-Pin Thermally Enhanced MSOP and  
(3mm × 3mm) DFN Packages  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
APPLICATIO S  
■
Automotive Battery Regulation  
■
Power for Portable Products  
■
Distributed Supply Regulation  
■
Industrial Supplies  
■
Wall Transformer Regulation  
U
TYPICAL APPLICATIO  
5V Step-Down Converter  
Efficiency  
V
OUT  
100  
90  
80  
70  
60  
50  
V
IN  
5V  
6.3V TO 36V  
3.5A  
V
= 12V  
IN  
V
IN  
BD  
RUN/SS  
BOOST  
OFF ON  
15k  
V
= 34V  
IN  
V
= 24V  
IN  
0.47 F  
4.7 H  
V
C
SW  
LT3693  
GND  
10 F  
RT  
680pF  
PG  
V
= 5V  
OUT  
536k  
63.4k  
L = 4.7μH  
SYNC  
FB  
f = 600kHz  
100k  
47 F  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
OUTPUT CURRENT (A)  
3693 G01  
3693 TA01a  
3693f  
1
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