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LTC3872EDDB-1#PBF PDF预览

LTC3872EDDB-1#PBF

更新时间: 2024-09-25 14:34:15
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
20页 297K
描述
LTC3872-1 - No RSENSE Current Mode Boost DC/DC Controller; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C

LTC3872EDDB-1#PBF 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,
针数:8Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.67Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
最大输入电压:9.8 V最小输入电压:2.75 V
标称输入电压:4.2 VJESD-30 代码:R-PDSO-N8
JESD-609代码:e3长度:3 mm
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:
封装主体材料:PLASTIC/EPOXY封装代码:HVSON
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):NOT SPECIFIED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:550 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:NOT SPECIFIED
宽度:2 mmBase Number Matches:1

LTC3872EDDB-1#PBF 数据手册

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LTC3872-1  
No R  
SENSE  
Current Mode Boost  
DC/DC Controller  
FeaTures  
DescripTion  
The LTC®3872-1 is a constant frequency current mode  
boost DC/DC controller that drives an N-channel power  
MOSFET and requires very few external components. The  
n
No Current Sense Resistor Required  
OUT  
n
V
up to 60V  
n
n
n
n
n
n
n
Constant Frequency 550kHz Operation  
Internal Soft-Start and Optional External Soft-Start  
Adjustable Current Limit  
No R  
TM architecture eliminates the need for a sense  
SENSE  
resistor, improves efficiency and saves board space.  
Pulse Skipping at Light Load  
The LTC3872-1 provides excellent AC and DC load and  
line regulation with 1.ꢀ5 output voltage accuracy. It  
incorporates an undervoltage lockout feature that shuts  
down the device when the input voltage falls below 2.3V.  
V Range: 2.7ꢀV to 9.8V  
IN  
1.ꢀ5 Voltage Reference Accuracy  
Current Mode Operation for Excellent Line and Load  
Transient Response  
n
LTC3872-1 has the same functionality as the standard  
LTC3872 except that it has no frequency foldback in cur-  
rent limit.  
Low Profile (1mm) SOT-23 and 2mm × 3mm DFN  
Packages  
High switching frequency of ꢀꢀ0kHz allows the use of a  
small inductor. The LTC3872-1 is available in an 8-lead  
low profile (1mm) ThinSOTTM package and 8-pin 2mm ×  
3mm DFN package.  
applicaTions  
n
Telecom Power Supplies  
n
42V Automotive Systems  
n
24V Industrial Controls  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
n
IP Phone Power Supplies  
No R  
and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks  
SENSE  
are the property of their respective owners.  
Typical applicaTion  
High Efficiency 3.3V Input, 5V Output Boost Converter  
Efficiency and Power Loss vs Load Current  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
1.8nF  
17.4k  
V
IN  
I
V
IN  
TH  
3.3V  
47pF  
V
IN  
10µF  
IPRG  
1
1µH  
LTC3872-1  
D1  
V
5V  
2A  
OUT  
GND  
SW  
0.1  
0.01  
0.001  
M1  
V
RUN/SS NGATE  
FB  
100µF  
×2  
11k  
1%  
1nF  
34.8k  
1%  
38721 TA01  
1
10  
100  
1000  
10000  
LOAD CURRENT (mA)  
38721 TA01b  
38721f  
1
For more information www.linear.com/LTC3872-1  

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