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LTC3459EDCB-TRPBF

更新时间： 2024-11-19 05:43:55
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
12页 215K
描述
10V Micropower Synchronous Boost Converter

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LTC3459EDCB-TRPBF 数据手册

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LTC3459  
10V Micropower  
Synchronous Boost Converter  
FEATURES  
DESCRIPTION  
TheLTC®3459isalowcurrent,highefficiencysynchronous  
boost converter intended for low power, size constrained  
portable applications. The LTC3459 can be powered from  
a single lithium ion battery, a 2- to 3-cell stack of alkaline  
or nickel batteries, or any low impedance voltage source  
between 1.5V and 5.5V. The output is programmable via  
an external divider between 2.5V and 10V. Although the  
n
Small Solution Size  
n
>85% Efficiency over Wide Load Range  
n
Internal Synchronous Rectifier  
n
V Range: 1.5V to 5.5V  
IN  
n
5V at 30mA from 3.3V Input  
n
3.3V at 20mA from 2 AA Cell Input  
n
Programmable Output Voltages Up to 10V  
Burst Mode® Operation  
n
part is primarily intended for boost applications, V  
maintain regulation below V (at reduced efficiency).  
will  
OUT  
n
Inrush Current Limiting  
Output Disconnect in Shutdown  
IN  
n
The LTC3459 offers Burst Mode operation with a fixed  
peak current, providing high conversion efficiency over  
a wide range of load currents. During start-up, inductor  
current is controlled preventing the inrush surge current  
found in many boost converters. In shutdown the output  
is disconnected from the input and quiescent current is  
reduced to <1μA.  
n
Ultralow Quiescent (10μA) and Shutdown (<1μA)  
Currents  
n
Low Profile 2mm × 2mm DFN, 2mm × 3mm DFN or  
SOT-23 Package  
APPLICATIONS  
The LTC3459 is offered in low profile 6-pin 2mm × 2mm  
DFN, 2mm × 3mm DFN or SOT-23 (ThinSOTTM) packages,  
allowing a tiny footprint for the total solution.  
, LT, LTC, LTM and Burst Mode 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.  
n
General Purpose Micropower Boost  
n
Digital Cameras  
n
PDAs  
LCD Bias  
Small OLED Displays  
Supercap Charging  
n
n
n
TYPICAL APPLICATION  
5V to 8V Converter  
Efficiency  
100  
V
V
= 5V  
IN  
OUT  
= 8V  
22μH  
90  
80  
70  
60  
50  
SW  
V
OUT  
8V  
5V  
V
V
OUT  
IN  
30mA  
2M  
47pF  
LTC3459  
OFF ON  
SHDN  
GND  
FB  
1μF  
4.7μF  
365k  
3459 TA01a  
0.01  
0.1  
1
10  
100  
I
(mA)  
LOAD  
3459 TA01b  
3459fc  
1
1234567...12

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