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LT1912EDD-PBF

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 300K
描述
36V, 2A, 500kHz Step-Down Switching Regulator

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中文翻译

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LT1912EDD-PBF 数据手册

 浏览型号LT1912EDD-PBF的Datasheet PDF文件第2页浏览型号LT1912EDD-PBF的Datasheet PDF文件第3页浏览型号LT1912EDD-PBF的Datasheet PDF文件第4页浏览型号LT1912EDD-PBF的Datasheet PDF文件第5页浏览型号LT1912EDD-PBF的Datasheet PDF文件第6页浏览型号LT1912EDD-PBF的Datasheet PDF文件第7页 
LT1912  
36V, 2A, 500kHz Step-Down  
Switching Regulator  
FEATURES  
DESCRIPTION  
The LT®1912 is an adjustable frequency (200kHz to  
500kHz) monolithic step-down switching regulator that  
accepts input voltages up to 36V. A high efficiency 0.25Ω  
switch is included on the die along with a boost Schottky  
diode and the necessary oscillator, control, and logic cir-  
cuitry. Current mode topology is used for fast transient  
response and good loop stability. The LT1912 allows the  
use of ceramic capacitors resulting in low output ripple  
while keeping total solution size to a minimum. The low  
current shutdown mode reduces input supply current  
to less than 1μA while a resistor and capacitor on the  
RUN/SS pin provide a controlled output voltage ramp  
(soft-start). The LT1912 is available in 10-Pin MSOP and  
3mm × 3mm DFN packages with exposed pads for low  
thermal resistance.  
■
Wide Input Range:  
Operation From 3.6V to 36V  
■
2A Maximum Output Current  
■
Adjustable Switching Frequency: 200kHz to 500kHz  
Low Shutdown Current: I < 1μA  
Integrated Boost Diode  
Synchronizable Between 250kHz to 500kHz  
Saturating Switch Design: 0.25Ω On-Resistance  
0.790V Feedback Reference Voltage  
Output Voltage: 0.79V to 20V  
Soft-Start Capability  
Small 10-Pin Thermally Enhanced MSOP and  
(3mm × 3mm) DFN Packages  
■
Q
■
■
■
■
■
■
■
APPLICATIONS  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
■
Automotive Battery Regulation  
■
Set Top Box  
■
Distributed Supply Regulation  
■
Industrial Supplies  
■
Wall Transformer Regulation  
TYPICAL APPLICATION  
3.3V Step-Down Converter  
Efficiency  
V
IN  
100  
90  
80  
70  
60  
50  
V
3.3V  
2A  
OUT  
4.5V TO 36V  
V
= 5V  
OUT  
V
BD  
IN  
RUN/SS  
BOOST  
OFF ON  
20k  
V
= 3.3V  
OUT  
0.47μF  
6.8μH  
V
C
SW  
LT1912  
GND  
4.7μF  
R
T
470pF  
316k  
V
= 12V  
IN  
68.1k  
SYNC  
FB  
L = 6.8μF  
F = 500kHz  
100k  
47μF  
0
0.5  
1.0  
LOAD CURRENT (A)  
1.5  
2
1912 TA01b  
1912 TA01  
1912f  
1
1234567...24

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