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LT1936

更新时间： 2024-12-01 14:58:07
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
20页 298K
描述
1.4A、500kHz 降压型开关稳压器

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中文翻译

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LT1936 数据手册

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LT1936  
1.4A, 500kHz Step-Down  
Switching Regulator  
FEATURES  
DESCRIPTION  
The LT®1936 is a current mode PWM step-down DC/DC  
converter with an internal 1.9A power switch, packaged  
in a tiny, thermally enhanced 8-lead MSOP. The wide in-  
put range of 3.6V to 36V makes the LT1936 suitable for  
regulating power from a wide variety of sources, including  
automotive batteries, 24V industrial supplies and unregu-  
latedwalladapters.Itshighoperatingfrequencyallowsthe  
use of small, low cost inductors and ceramic capacitors,  
resulting in low, predictable output ripple.  
■
Wide Input Range: 3.6V to 36V  
■
Short-Circuit Protected Over Full Input Range  
■
1.9A Guaranteed Minimum Switch Current  
■
5V at 1.4A from 10V to 36V Input  
■
3.3V at 1.4A from 7V to 36V Input  
■
5V at 1.2A from 6.3V to 36V Input  
■
3.3V at 1.2A from 4.5V to 36V Input  
■
Output Adjustable Down to 1.20V  
■
500kHz Fixed Frequency Operation  
■
Soft-Start  
Cycle-by-cycle current limit, frequency foldback and  
thermal shutdown provide protection against shorted  
outputs, and soft-start eliminates input current surge  
during start-up. Transient response can be optimized by  
usingexternalcompensationcomponents,orboardspace  
can be minimized by using internal compensation. The  
low current (<2μA) shutdown mode enables easy power  
management in battery-powered systems.  
■
Uses Small Ceramic Capacitors  
■
Internal or External Compensation  
■
Low Shutdown Current: <2μA  
■
Thermally Enhanced 8-Lead MSOP Package  
APPLICATIONS  
■
Automotive Battery Regulation  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
■
Industrial Control Supplies  
■
Unregulated Wall Adapters  
TYPICAL APPLICATION  
3.3V Step-Down Converter  
Efficiency  
95  
V
= 12V  
IN  
V
IN  
4.5V TO 36V  
V
= 5V  
OUT  
90  
85  
80  
75  
70  
65  
0.22μF  
V
BOOST  
SW  
IN  
10μH  
17.4k  
V
3.3V  
1.2A  
OUT  
SHDN  
ON OFF  
V
= 3.3V  
OUT  
LT1936  
4.7μF  
COMP  
FB  
GND  
V
C
10k  
22μF  
1936 TA01a  
0
0.5  
1
1.5  
LOAD CURRENT (A)  
1936 TA01b  
1936fd  
1
1234567...20

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