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LT1933

更新时间： 2024-09-23 22:51:47
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
16页 629K
描述
600mA, 500kHz Step-Down Switching Regulator in SOT-23

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中文翻译

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LT1933 数据手册

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LT1933  
600mA, 500kHz Step-Down  
Switching Regulator  
in SOT-23  
U
FEATURES  
DESCRIPTIO  
The LT®1933 is a current mode PWM step-down DC/DC  
converter with an internal 0.75A power switch, packaged  
in a tiny 6-lead SOT-23. The wide input range of 3.6V to  
36V makes the LT1933 suitable for regulating power from  
a wide variety of sources, including unregulated wall  
transformers, 24V industrial supplies and automotive  
batteries. Its high operating frequency allows the use of  
tiny, low cost inductors and ceramic capacitors, resulting  
in low, predictable output ripple.  
■
Wide Input Range: 3.6V to 36V  
■
5V at 600mA from 16V to 36V Input  
■
3.3V at 600mA from 12V to 36V Input  
■
5V at 500mA from 6.3V to 36V Input  
■
3.3V at 500mA from 4.5V to 36V Input  
■
Fixed Frequency 500kHz Operation  
■
Uses Tiny Capacitors and Inductors  
■
Soft-Start  
Internally Compensated  
■
■
Low Shutdown Current: <2µA  
Output Adjustable Down to 1.25V  
Low Profile (1mm) SOT-23 (ThinSOT™) Package  
Cycle-by-cycle current limit provides protection against  
shorted outputs, and soft-start eliminates input current  
surge during start up. The low current (<2µA) shutdown  
provides output disconnect, enabling easy power man-  
agement in battery-powered systems.  
■
■
U
APPLICATIO S  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technology Corporation.  
■
Automotive Battery Regulation  
■
Industrial Control Supplies  
■
Wall Transformer Regulation  
■
Distributed Supply Regulation  
■
Battery-Powered Equipment  
U
TYPICAL APPLICATIO  
3.3V Step-Down Converter  
Efficiency  
95  
1N4148  
V
IN  
= 12V  
V
IN  
V
IN  
BOOST  
4.5V TO 36V  
90  
85  
80  
75  
70  
65  
LT1933  
0.1µF  
V
= 5V  
OUT  
22µH  
OFF ON  
SHDN  
GND  
SW  
FB  
V
OUT  
3.3V/500mA  
V
= 3.3V  
OUT  
MBRM140  
16.5k  
2.2µF  
22µF  
10k  
1933 TA01a  
100  
200  
LOAD CURRENT (mA)  
500  
600  
0
300  
400  
1933 TA01b  
1933f  
1
1234567...16

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LT1933HDCB#TRM Linear

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 		IC 1.05 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO6, 2 X 3 MM, 0.75 MM HEIGHT

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