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LT3464_1

更新时间: 2024-11-04 05:43:31
品牌 Logo 应用领域
凌特 - Linear 转换器升压转换器
页数 文件大小 规格书
16页 236K
描述
Micropower Boost Converter with Schottky and Output Disconnect in ThinSOT™

LT3464_1 数据手册

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LT3464  
Micropower Boost  
Converter with Schottky and  
Output Disconnect in ThinSOT™  
U
DESCRIPTIO  
FEATURES  
The LT®3464 is a micropower step-up DC/DC converter  
with integrated Schottky diode and output disconnect  
packaged in an 8-lead low profile (1mm) SOT-23. The  
small package size, high level of integration, and the use  
of tiny SMT components yield a solution size of less than  
40mm2. The LT3464 has a typical current limit of 115mA  
as well as fast switching speed to allow the use of a chip  
inductor and small ceramic capacitors. The internal PNP  
disconnects the output load from the input during shut-  
down, and also provides output short-circuit protection.  
An auxiliary reference input allows the user to override the  
internal 1.25V feedback reference with any lower value,  
allowing full control of the output voltage during opera-  
tion. This device features a low 25µA quiescent current,  
which is further reduced to less than 0.5µA in shutdown.  
A current limited fixed off-time control scheme conserves  
operating current, resulting in high efficiency over a broad  
range of operating current. The rugged 36V switch and  
output disconnect circuitry allow outputs up to 34V to be  
easily generated in a simple boost topology.  
Tiny Solution Size  
Low Quiescent Current  
25µA in Active Mode  
0.5µA in Shutdown Mode  
Internal 115mA, 36V Switch  
Integrated Schottky Diode  
Integrated PNP Output Disconnect with  
Short-Circuit Protection  
Internal Reference Override Pin  
16V at 8mA from 3.6V Input  
12V at 20mA from 5V Input  
Input Range: 2.3V to 10V  
High Output Voltage: Up to 34V  
Low Profile (1mm) SOT-23 Package  
U
APPLICATIO S  
OEL Panel Bias  
LCD Bias  
Handheld Computers  
Battery Backup  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technolgy Corporation  
Digital Cameras  
Cellular Phones  
U
TYPICAL APPLICATIO  
Efficiency  
22µH  
90  
V
IN  
2.3V TO 10V  
V
IN  
= 8.4V  
80  
70  
60  
50  
40  
30  
V
SW  
IN  
V
= 4.2V  
IN  
V
OUT  
OUT  
16V  
0.22µF  
0.33µF  
CTRL  
1µF  
LT3464 CAP  
3.48M  
294k  
SHDN  
FB  
GND  
3464 TA01a  
0.01  
0.1  
1
10  
100  
LOAD CURRENT (mA)  
3634 TA01b  
3464f  
1

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