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LTC3440EDD PDF预览

LTC3440EDD

更新时间： 2024-09-25 05:43:51
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
20页 217K
描述
Micropower Synchronous Buck-Boost DC/DC Converter

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中文翻译

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LTC3440EDD 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：VSON, SOLCC10,.12,20
针数：10Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：2.5 V
标称输入电压：3.6 VJESD-30 代码：S-PDSO-N10
JESD-609代码：e0长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：10最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：VSON封装等效代码：SOLCC10,.12,20
封装形状：SQUARE封装形式：SMALL OUTLINE, 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：BUCK-BOOST
最大切换频率：2000 kHz技术：CMOS
温度等级：INDUSTRIAL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

LTC3440EDD 数据手册

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LTC3440  
Micropower Synchronous  
Buck-Boost DC/DC Converter  
U
FEATURES  
DESCRIPTIO  
The LTC®3440 is a high efficiency, fixed frequency, Buck-  
Boost DC/DC converter that operates from input voltages  
above, below or equal to the output voltage. The topology  
incorporated in the IC provides a continuous transfer  
functionthroughalloperatingmodes, makingtheproduct  
ideal for single lithium-ion, multicell alkaline or NiMH  
applications where the output voltage is within the battery  
voltage range.  
■
Single Inductor  
Fixed Frequency Operation with Battery Voltages  
■
Above, Below or Equal to the Output  
■
Synchronous Rectification: Up to 96% Efficiency  
25μA Quiescent Current in Burst Mode® Operation  
■
■
Up to 600mA Continuous Output Current  
■
No Schottky Diodes Required (VOUT < 4.3V)  
VOUT Disconnected from VIN During Shutdown  
2.5V to 5.5V Input and Output Range  
Programmable Oscillator Frequency  
■
■
The device includes two 0.19Ω N-channel MOSFET  
switches and two 0.22Ω P-channel switches. Switching  
frequencies up to 2MHz are programmed with an external  
resistor and the oscillator can be synchronized to an  
external clock. Quiescent current is only 25μA in Burst  
Mode operation, maximizing battery life in portable appli-  
cations. Burst Mode operation is user controlled and can  
be enabled by driving the MODE/SYNC pin high. If the  
MODE/SYNC pin has either a clock or is driven low, then  
fixed frequency switching is enabled.  
■
from 300kHz to 2MHz  
Synchronizable Oscillator  
Burst Mode Enable Control  
<1μA Shutdown Current  
Small Thermally Enhanced 10-Pin MSOP and  
■
■
■
■
(3mm  
×
3mm) DUFN Packages  
APPLICATIO S  
■
Palmtop Computers  
Handheld Instruments  
MP3 Players  
Digital Cameras  
Other features include a 1μA shutdown, soft-start con-  
trol, thermalshutdownandcurrentlimit. TheLTC3440is  
available in the 10-pin thermally enhanced MSOP and  
(3mm × 3mm) DFN packages.  
■
■
■
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
Protected by U.S. Patents including 6404251, 6166527.  
U
TYPICAL APPLICATIO  
Li-Ion to 3.3V at 600mA Buck-Boost Converter  
Efficiency vs VIN  
100  
L1  
V
I
f
= 3.3V  
= 100mA  
= 1MHz  
10μH  
OUT  
OUT  
OSC  
V
OUT  
98  
96  
94  
92  
90  
88  
86  
84  
82  
80  
3.3V  
600mA  
3
7
8
2
1
4
6
9
SW1  
LTC3440  
SW2  
V
= 2.7V TO 4.2V  
IN  
R1  
V
V
IN  
OUT  
FB  
340k  
SHDN/SS  
C2  
22μF  
C5 1.5nF  
10  
+
MODE/SYNC  
V
C
*
C1  
10μF  
Li-Ion  
R3  
5
15k  
R2  
200k  
R
GND  
T
R
T
60.4k  
2.5  
3.0  
4.0  
(V)  
4.5  
5.0  
5.5  
3.5  
*1 = Burst Mode OPERATION  
0 = FIXED FREQUENCY  
C1: TAIYO YUDEN JMK212BJ106MG  
C2: TAIYO YUDEN JMK325BJ226MM  
L1: SUMIDA CDRH6D38-100  
3440 TA01  
V
IN  
3440 TA02  
3440fb  
1
1234567...20

中文翻译

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