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LTC3672BEDC-1-TRPBF PDF预览

LTC3672BEDC-1-TRPBF

更新时间： 2024-01-09 09:18:55
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
12页 165K
描述
Monolithic Fixed-Output 400mA Buck Regulator with Dual 150mA LDOs in 2mm × 2mm DFN

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中文翻译

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LTC3672BEDC-1-TRPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：DFN包装说明：HVSON, SOLCC8,.08,20
针数：8Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.22模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE最大输入电压：5.5 V
最小输入电压：2.9 V标称输入电压：3.6 V
JESD-30 代码：S-PDSO-N8JESD-609代码：e3
长度：2 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：1.1 A封装主体材料：PLASTIC/EPOXY
封装代码：HVSON封装等效代码：SOLCC8,.08,20
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）：260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：BUCK
最大切换频率：2700 kHz技术：CMOS
温度等级：COMMERCIAL EXTENDED端子面层：Matte Tin (Sn)
端子形式：NO LEAD端子节距：0.45 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：2 mmBase Number Matches：1

LTC3672BEDC-1-TRPBF 数据手册

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LTC3672B-1  
Monolithic Fixed-Output  
400mA Buck Regulator with Dual  
150mA LDOs in 2mm × 2mm DFN  
FEATURES  
DESCRIPTION  
The LTC®3672B-1 is a triple power supply composed of a  
400mA synchronous buck regulator and two 150mA low-  
dropout linear regulators (LDOs), where one of the LDOs  
canbepoweredfromthebuckoutputtoimproveefficiency.  
Constant-frequency 2.25MHz operation is maintained  
down to very light loads. The input supply range of 2.9V  
to5.5Visespeciallywell-suitedforsingle-cellLithium-Ion  
and Lithium-Polymer applications, and for powering low  
voltage ASICs from 3.3V or 5V rails.  
■
Triple Output Supply From a Single 2.9V to 5.5V Input  
Buck DC/DC: Fixed 1.8V Output, Up to 400mA  
LDO1: Fixed 1.2V Output, Up to 150mA  
LDO2: Fixed 2.8V Output, Up to 150mA  
2.5ꢀ ꢁeference Accuracy  
■
■
■
■
■
■
■
Constant Frequency 2.25MHz Operation  
Minimum External Component Count  
Current Mode Operation for Excellent Line and Load  
Transient Response  
■
■
Internal Soft-Start for Each Output  
The LTC3672B-1 regulates 1.8V at the buck output, 1.2V  
at the LDO1 output, and 2.8V at the LDO2 output. Exter-  
nal component count is minimal—all that is needed is a  
single inductor, an input capacitor, and output capacitors  
for each of the three outputs. Control loop compensation  
is internal to the LTC3672B-1.  
Single Enable Pin Turns On/Shuts Down All Three  
Outputs  
■
Tiny 2mm × 2mm × 0.75mm DFN Package  
APPLICATIONS  
■
DMB Cellphones  
The LTC3672B-1 is available in a 2mm × 2mm × 0.75mm  
8-Lead DFN package.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
■
Handheld Products (PDA, PMP, GPS)  
■
Multivoltage Power for Digital Logic, I/O, FPGAs,  
CPLDs, ASICs, CPUs, and RF Chipsets  
TYPICAL APPLICATION  
Buck DC/DC Efficiency vs Load  
100  
V
IN  
2.9V TO 5.5V  
95  
90  
85  
80  
75  
70  
65  
60  
V
= 2.9V  
IN  
4.7MH  
V
= 3.6V  
V
IN  
OUT1  
V
2.2MF  
IN  
1.8V  
SW  
400mA  
(250mA IF LDO1  
FULLY-LOADED)  
10MF  
V
= 5.5V  
IN  
GND  
BUCKOUT  
V
IN1  
V
1.2V  
150mA  
OUT2  
LDO1  
ENABLE  
INPUT  
ENALL  
1MF  
1MF  
LTC3672B-1  
V
2.8V  
OUT3  
LDO2  
UP TO 150mA  
(SUBJECT TO DROPOUT  
LIMITATIONS)  
0
50 100 150 200 250 300 350 400  
(mA)  
3672b1 TA01  
I
LOAD  
3672b1 TA01b  
3672B1f  
1
1234567...12

中文翻译

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