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LTC3499BEDD PDF预览

LTC3499BEDD

更新时间： 2024-10-01 05:43:55
品牌 Logo 应用领域
凌特 - Linear 转换器稳压器开关式稳压器或控制器电源电路电池开关式控制器光电二极管
页数 文件大小 规格书
16页 247K
描述
750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection

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中文翻译

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LTC3499BEDD 技术参数

是否Rohs认证：不符合生命周期：Transferred
零件包装代码：DFN包装说明：HVSON, SOLCC8,.11,20
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.14Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.5 V
最小输入电压：1.8 V标称输入电压：2.4 V
JESD-30 代码：S-PDSO-N8JESD-609代码：e0
长度：3 mm湿度敏感等级：1
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：HVSON封装等效代码：SOLCC8,.11,20
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）：235认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BOOST
最大切换频率：1400 kHz技术：CMOS
温度等级：OTHER端子面层：Tin/Lead (Sn/Pb)
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：20
宽度：3 mmBase Number Matches：1

LTC3499BEDD 数据手册

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LTC3499/LTC3499B  
750mA Synchronous  
Step-Up DC/DC Converters  
with Reverse-Battery Protection  
U
FEATURES  
DESCRIPTIO  
The LTC®3499/LTC3499B are synchronous, fixed fre-  
quency step-up DC/DC power converters with integrated  
reverse battery protection that protect and disconnect the  
devicesandloadwhenthebatterypolarityisreversedwhile  
delivering high efficiency in a small (3mm × 3mm) DFN  
package.Trueoutputdisconnecteliminatesinrushcurrent  
and allows zero load current in shutdown.  
■
Reverse-Battery Protection for DC/DC Converter  
and Load  
■
High Efficiency: Up to 94%  
■
Generates 5V at 175mA from a 1.8V Input  
■
Operates from 1.8V to 5.5V Input Supply  
■
2V to 6V Adjustable Output Voltage  
■
Inrush Current Controlled During Start-Up  
■
Output Disconnnect in Shutdown  
The devices feature an input voltage range of 1.8V to 5.5V  
enabling operation from two alkaline or NiMH batteries.  
The switching frequency is internally set at 1.2MHz allow-  
ingtheuseoftinysurfacemountinductorsandcapacitors.  
A minimal number of external components are required to  
generate output voltages ranging from 2V to 6V. The  
LTC3499 features automatic Burst Mode operation to  
increase efficiency at light loads, while the LTC3499B  
features continuous switching at light loads.  
■
Low Noise 1.2MHz PWM Operation  
■
Tiny External Components  
Automatic Burst Mode® Operation (LTC3499)  
■
■
Continuous Switching at Light Loads (LTC3499B)  
Overvoltage Protection  
8-Lead (3mm × 3mm × 0.75mm) DFN  
■
■
and MSOP Packages  
U
APPLICATIO S  
The soft-start time is externally programmable through a  
smallcapacitor.Anti-ringcircuitryreducesEMIemissions  
by damping the inductor in discontinuous mode. The  
devicesfeature<1µAshutdownsupplycurrent, integrated  
overvoltage protection and are available in both 8-pin  
(3mm × 3mm) DFN and 8-pin MSOP packages.  
■
Medical Equipment  
■
Digital Cameras  
■
MP3 Players  
Handheld Instruments  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
Battery Current vs V  
IN  
Two AA Cells to 5V Synchronous Boost Converter  
1.0  
0.5  
SHDN = 0V  
= 0V  
V
OUT  
4.7µH  
V
IN  
1.8V TO 3.2V  
+
V
2.2µF  
SW  
OUT  
FB  
IN  
LTC3499  
V
OUT  
0
V
5V  
ON OFF  
SHDN  
VC  
175mA  
1M  
10µF  
–0.5  
–1.0  
100k  
330pF  
SS  
GND  
324k  
0.01µF  
–6  
–4  
–2  
0
2
4
6
3499 TA01  
V
AND SW VOLTAGE (V)  
IN  
3499 TA01b  
3499f  
1
1234567...16

中文翻译

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