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LTC3642EDD-3.3#PBF PDF预览

LTC3642EDD-3.3#PBF

更新时间: 2024-11-23 20:57:27
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
22页 1681K
描述
LTC3642 - High Efficiency, High Voltage 50mA Synchronous Step-Down Converter; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C

LTC3642EDD-3.3#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, SOLCC8,.11,20
针数:8Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:2.85模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE最大输入电压:45 V
最小输入电压:4.5 V标称输入电压:10 V
JESD-30 代码:S-PDSO-N8JESD-609代码:e3
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:0.05 A标称输出电压:3.3 V
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):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:3 mmBase Number Matches:1

LTC3642EDD-3.3#PBF 数据手册

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LTC3642  
High Efficiency, High Voltage  
50mA Synchronous  
Step-Down Converter  
FEATURES  
DESCRIPTION  
The LTC®3642 is a high efficiency, high voltage step-down  
DC/DC converter with internal high side and synchronous  
power switches that draws only 12μA typical DC sup-  
ply current at no load while maintaining output voltage  
regulation.  
n
Wide Input Voltage Range: 4.5V to 45V  
n
Tolerant of 60V Input Transients  
n
Internal High Side and Low Side Power Switches  
n
No Compensation Required  
50mA Output Current  
n
n
Low Dropout Operation: 100% Duty Cycle  
The LTC3642 can supply up to 50mA load current and  
features a programmable peak current limit that provides  
a simple method for optimizing efficiency in lower current  
applications. The LTC3642’s combination of Burst Mode®  
operation, integrated power switches, low quiescent cur-  
rent, and programmable peak current limit provides high  
efficiency over a broad range of load currents.  
n
Low Quiescent Current: 12µA  
n
0.8V Feedback Voltage Reference  
n
Adjustable Peak Current Limit  
n
Internal and External Soft-Start  
n
Precise RUN Pin Threshold with Adjustable  
Hysteresis  
n
3.3V, 5V and Adjustable Output Versions  
n
With its wide 4.5V to 45V input range and internal  
overvoltagemonitorcapableofprotectingthepartthrough  
60V surges, the LTC3642 is a robust converter suited for  
regulating a wide variety of power sources. Additionally,  
theLTC3642includesapreciserunthresholdandsoft-start  
feature to guarantee that the power system start-up is  
well-controlled in any environment.  
Only Three External Components Required for Fixed  
Output Versions  
n
Low Profile (0.75mm) 3mm × 3mm DFN and  
Thermally-Enhanced MS8E Packages  
APPLICATIONS  
n
4mA to 20mA Current Loops  
The LTC3642 is available in the thermally enhanced  
3mm × 3mm DFN and MS8E packages.  
L, LT, LTC, LTM, Burst Mode, Linear Technology, and the Linear logo are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
Industrial Control Supplies  
n
Distributed Power Systems  
n
Portable Instruments  
n
Battery-Operated Devices  
n
Automotive Power Systems  
Efficiency and Power Loss vs Load Current  
TYPICAL APPLICATION  
100  
V
= 10V  
IN  
95  
90  
85  
80  
75  
70  
65  
100  
10  
1
5V, 50mA Step-Down Converter  
EFFICIENCY  
150µH  
V
OUT  
V
IN  
V
SW  
5V  
IN  
5V TO 45V  
1µF  
50mA  
LTC3642-5  
10µF  
POWER LOSS  
RUN  
HYST  
V
OUT  
SS  
I
SET  
GND  
3642 TA01a  
0.1  
100  
0.1  
1
10  
LOAD CURRENT (mA)  
3642 TA01b  
3642fc  
1

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