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LT1913EDD-TRPBF

更新时间： 2024-11-29 05:43:27
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
24页 283K
描述
25V, 3.5A, 2.4MHz Step-Down Switching Regulator

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中文翻译

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LT1913EDD-TRPBF 数据手册

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LT1913  
25V, 3.5A, 2.4MHz  
Step-Down Switching Regulator  
U
DESCRIPTIO  
FEATURES  
The LT®1913 is an adjustable frequency (200kHz to  
2.4MHz)monolithicbuckswitchingregulatorthataccepts  
■
Wide Input Range: 3.6V to 25V  
■
3.5A Maximum Output Current  
■
Adjustable Switching Frequency: 200kHz to 2.4MHz  
Low Shutdown Current: I < 1μA  
Integrated Boost Diode  
input voltages up to 25V. 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
Synchronizable Between 250kHz to 2MHz  
Power Good Flag  
Saturating Switch Design: 95m On-Resistance  
0.790V Feedback Reference Voltage  
Output Voltage: 0.79V to 25V  
Thermal Protection  
(soft-start). A power good flag signals when V  
reaches  
OUT  
91% of the programmed output voltage. The LT1913 is  
available in 10-Pin 3mm × 3mm DFN packages with ex-  
posed pads for low thermal resistance.  
Soft-Start Capability  
Small 10-Pin (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  
V
IN  
100  
90  
80  
70  
60  
50  
5V  
6.5V TO 25V  
3.5A  
V
= 12V  
IN  
V
BD  
IN  
RUN/SS  
BOOST  
OFF ON  
15k  
0.47μF  
V
= 24V  
IN  
4.7μH  
V
C
SW  
LT1913  
GND  
10μF  
RT  
680pF  
PG  
536k  
V
= 5V  
OUT  
63.4k  
SYNC  
FB  
L = 4.7μH  
f = 600kHz  
100k  
47μF  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
OUTPUT CURRENT (A)  
1913 TA01a  
1913 G01  
1913f  
1
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