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LTC3526LBEDC-2#PBF PDF预览

LTC3526LBEDC-2#PBF

更新时间： 2023-02-26 15:36:10
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
16页 337K
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LTC3526LBEDC-2#PBF

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LTC3526LBEDC-2#PBF 数据手册

 浏览型号LTC3526LBEDC-2#PBF的Datasheet PDF文件第2页浏览型号LTC3526LBEDC-2#PBF的Datasheet PDF文件第3页浏览型号LTC3526LBEDC-2#PBF的Datasheet PDF文件第4页浏览型号LTC3526LBEDC-2#PBF的Datasheet PDF文件第5页浏览型号LTC3526LBEDC-2#PBF的Datasheet PDF文件第6页浏览型号LTC3526LBEDC-2#PBF的Datasheet PDF文件第7页 
LTC3526L-2/LTC3526LB-2  
550mA 2MHz Synchronous  
Step-Up DC/DC Converters  
in 2mm × 2mm DFN  
FeaTures  
DescripTion  
The LTC®3526L-2/LTC3526LB-2 are synchronous, fixed  
frequency step-up DC/DC converters with output discon-  
nect. Synchronous rectification enables high efficiency in  
the low profile 2mm × 2mm DFN package. Battery life in  
single AA/AAA powered products is extended further with  
a 680mV start-up voltage and operation down to 500mV  
once started.  
n
Delivers 3.3V at 100mA from a Single Alkaline/  
NiMH Cell or 3.3V at 200mA from Two Cells  
IN  
n
V Start-Up Voltage: 680mV  
n
n
n
n
n
n
n
n
n
n
n
n
n
1.5V to 5.25V V  
Range  
OUT  
Up to 94% Efficiency  
Output Disconnect  
2MHz Fixed Frequency Operation  
V > V  
Operation  
IN  
OUT  
A switching frequency of 2MHz minimizes solution foot-  
print by allowing the use of tiny, low profile inductors  
and ceramic capacitors. The current mode PWM design  
is internally compensated, reducing external parts count.  
The LTC3526L-2 features Burst Mode operation at light  
load conditions allowing it to maintain high efficiency over  
a wide range of load. The LTC3526LB-2 features fixed  
frequency operation for low noise applications. Anti-ring  
circuitry reduces EMI by damping the inductor in discon-  
tinuousmode. Additionalfeaturesincludealowshutdown  
current of under 1µA and thermal shutdown.  
Integrated Soft-Start  
Current Mode Control with Internal Compensation  
Burst Mode® Operation with 9µA I (LTC3526L-2)  
Q
Low Noise PWM Operation (LTC3526LB-2)  
Internal Synchronous Rectifier  
Logic Controlled Shutdown (I < 1µA)  
Q
Anti-Ring Control  
Low Profile (2mm × 2mm × 0.75mm) 6-Lead  
DFN Package  
applicaTions  
The LTC3526L-2/LTC3526LB-2 are housed in a 2mm ×  
2mm × 0.75mm DFN package.  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Patents pending.  
n
Medical Instruments  
n
Noise Canceling Headphones  
n
Wireless Mice  
Bluetooth Headsets  
n
Typical applicaTion  
Efficiency and Power Loss vs Load Current  
100  
1000  
100  
10  
V
= 2.4V  
IN  
2.2µH  
90  
EFFICIENCY  
80  
SW  
V
70  
OUT  
V
IN  
3.3V  
V
IN  
V
OUT  
1.6V TO 3.2V  
60  
50  
200mA  
4.7µF  
LTC3526L-2  
SHDN FB  
GND  
1.78M  
1M  
33pF  
POWER LOSS  
4.7µF  
OFF ON  
40  
30  
20  
10  
0
1
3526lb2 TA01a  
0.1  
0.01  
0.01  
0.1  
1
10  
100  
1000  
LOAD CURRENT (mA)  
3526lb2 TA01b  
3526lb2fa  
ꢀ
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