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LTC3526B PDF预览

LTC3526B

更新时间： 2024-02-05 09:49:45
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
16页 255K
描述
500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN

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中文翻译

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LTC3526B 技术参数

是否无铅：含铅是否Rohs认证：符合
生命周期：Active包装说明：HVSON,
针数：6Reach Compliance Code：compliant
风险等级：5.17Is Samacsys：N
其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 1.5V TO 5.25V模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5 V最小输入电压：0.5 V
标称输入电压：1.2 VJESD-30 代码：S-PDSO-N6
JESD-609代码：e3长度：2 mm
湿度敏感等级：1功能数量：1
端子数量：6最高工作温度：85 °C
最低工作温度：最大输出电流：0.55 A
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：0.8 mm表面贴装：YES
切换器配置：BOOST最大切换频率：1250 kHz
技术：CMOS温度等级：OTHER
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：2 mm
Base Number Matches：1

LTC3526B 数据手册

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LTC3526/LTC3526B  
500mA 1MHz Synchronous  
Step-Up DC/DC Converters  
in 2mm × 2mm DFN  
DESCRIPTION  
FEATURES  
n
Delivers 3.3V at 100mA from a Single Alkaline/  
TheLTC®3526/LTC3526Baresynchronous,fixedfrequency  
step-up DC/DC converters with output disconnect. Syn-  
chronous rectification enables high efficiency in the low  
profile 2mm × 2mm DFN package. Battery life in single  
AA/AAA powered products is extended further with an  
850mV start-up voltage and operation down to 500mV  
once started.  
NiMH Cell or 3.3V at 200mA from Two Cells  
n
V Start-Up Voltage: 850mV  
IN  
n
n
n
n
n
n
n
n
1.6V to 5.25V V  
Range  
OUT  
Up to 94% Efficiency  
Output Disconnect  
1MHz Fixed Frequency Operation  
V > V  
Operation  
IN  
OUT  
A switching frequency of 1MHz minimizes solution foot-  
print by allowing the use of tiny, low profile inductors and  
ceramic capacitors. The current mode PWM design is  
internallycompensated,reducingexternalpartscount.The  
LTC3526 features automatic Burst Mode operation at light  
load conditions, while the LTC3526B features continuous  
switching at light loads. Anti-ringing control circuitry also  
reduces EMI concerns by damping the inductor in discon-  
tinuousmode. Additionalfeaturesincludealowshutdown  
current of under 1μA and thermal shutdown.  
Integrated Soft-Start  
Current Mode Control with Internal Compensation  
Automatic Burst Mode® Operation with 9μA  
Quiescent Current (LTC3526)  
n
n
n
n
n
Low Noise PWM Operation (LTC3526B)  
Internal Synchronous Rectifier  
Logic Controlled Shutdown (I < 1μA)  
Q
Anti-Ringing Control  
Low Profile (2mm × 2mm × 0.75mm) DFN Package  
The LTC3526/LTC3526B are housed in a 2mm × 2mm ×  
APPLICATIONS  
0.75mm DFN package.  
n
Medical Instruments  
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology  
Corporation. All other trademarks are the property of their respective owners.  
n
Flash-Based MP3 Players  
n
Noise Canceling Headphones  
Wireless Mice  
n
n
Bluetooth Headsets  
TYPICAL APPLICATION  
LTC3526 Efficiency and Power Loss vs Load Current  
100  
1000  
100  
10  
V
= 2.4V  
IN  
90  
4.7μH  
EFFICIENCY  
80  
70  
SW  
V
OUT  
V
IN  
60  
50  
3.3V  
V
IN  
V
OUT  
1.6V TO 3.2V  
200mA  
1μF  
LTC3526  
SHDN  
GND  
1.78M  
1M  
POWER LOSS  
40  
30  
20  
10  
0
1
OFF ON  
FB  
4.7μF  
0.1  
0.01  
3526 TA01a  
0.01  
0.1  
1
10  
100  
1000  
LOAD CURRENT (mA)  
3526 TA01b  
3526bfb  
1
1234567...16

中文翻译

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