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LT3467/LT3467A的datasheet

更新时间:2019-08-05 09:04:30 大小:280K 上传用户:3697979查看TA发布的资源 标签:LT3467LT3467A 下载积分:2分 评价赚积分 (如何评价?) 收藏 评论(0) 举报

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LT3467/LT3467A的datasheet 手册 用于了解学习

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3467afe.pdf 280K

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LT3467/LT3467A  
1.1A Step-Up DC/DC  
Converter with  
Integrated Soft-Start  
FEATURES  
DESCRIPTION  
The LT®3467/LT3467A switching regulators combine a  
42V, 1.1A switch with a soft-start function. Pin compatible  
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1.3MHz Switching Frequency (LT3467)  
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2Hiic)  
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Low V  
Switch: 330mV at 1.1A  
with the LT1930, its low V  
bipolar switch enables the  
CESAT  
CESAT  
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HiOl
device to deliver high current outputs in a small footprint.  
The LT3467 switches at 1.3MHz, allowing the use of tiny,  
low cost and low height inductors and capacitors. The  
LT3467A switches at 2.1MHz, allowing the use of even  
smaller components. High inrush current at start-up is  
eliminated using the programmable soft-start function.  
A single external capacitor sets the current ramp rate. A  
constantfrequencycurrentmodePWMarchitectureresults  
in low, predictable output noise that is easy to filter.  
Wide Input Range: 2.4V to 16V  
Dedicated Soft-Start Pin  
5V at 540mA from 3.3V Input (LT3467)  
5V at 430mA from 3.3V Input (LT3467A)  
12V at 270mA from 5V Input (LT3467)  
12V at 260mA from 5V Input (LT3467A)  
Uses Small Surface Mount Components  
Low Shutdown Current: <1μA  
Pin-for-Pin Compatible with the LT1930 and LT1613  
The high voltage switch on the LT3467/LT3467A is rated  
at 42V, making the devices ideal for boost converters up  
to 40V as well as SEPIC and flyback designs. The LT3467  
can generate 5V at up to 540mA from a 3.3V supply or  
5V at 450mA from four alkaline cells in a SEPIC design.  
The LT3467A can generate 5V at up to 430mA from a 3.3V  
supply or 15V at 135mA from a 3.3V supply. The LT3467/  
LT3467Aareavailableinalowprofile(1mm)6-leadSOT-23  
package and tiny 3mm × 2mm DFN package.  
Low Profile (1mm) ThinSOT Package  
Low Profile (0.75mm) 8-Lead (3mm × 2mm)  
DFN Package  
APPLICATIONS  
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Digital Cameras  
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White LED Power Supplies  
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Cellular Phones  
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Medical Diagnostic Equipment  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
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Local 5V or 12V Supplies  
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TFT-LCD Bias Supplies  
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xDSL Power Supplies  
TYPICAL APPLICATION  
Efficiency  
95  
Single Li-Ion Cell to 5V Boost Converter  
90  
V
= 4.2V  
2.7μH  
IN  
V
85  
80  
75  
70  
65  
60  
55  
50  
IN  
V
OUT  
5V  
2.6V TO  
4.2V  
V
= 3.3V  
IN  
V
= 2.6V  
765mA AT V = 4.2V,  
IN  
IN  
IN  
IN  
4.7μF  
402k  
133k  
540mA AT V = 3.3V,  
V
SW  
IN  
360mA AT V = 2.6V  
SHDN  
OFF ON  
3.3pF  
LT3467  
SS  
FB  
GND  
15μF  
0.047μF  
3467 TA01a  
800  
900  
100  
300 400 500  
700  
200  
600  
I
(mA)  
OUT  
3467 TA01b  
3467afe  
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