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Datasheet > 电源电路 > 开关式稳压器或控制器> LTC3809IMSE-1#TR
LTC3809IMSE-1#TR PDF预览

LTC3809IMSE-1#TR

更新时间： 2024-11-26 13:01:39
品牌 Logo 应用领域
凌特 - Linear 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
24页 255K
描述
IC 1 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO10, PLASTIC, MSOP-10, Switching Regulator or Controller

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LTC3809IMSE-1#TR 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Transferred零件包装代码：MSOP
包装说明：TSSOP, TSSOP10,.19,20针数：10
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.12
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION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 V
JESD-30 代码：S-PDSO-G10JESD-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
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP10,.19,20
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：235认证状态：Not Qualified
座面最大高度：1.1 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：600 kHz技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING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

LTC3809IMSE-1#TR 数据手册

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LTC3809-1  
No RSENSETM, Low Input  
Voltage, Synchronous DC/DC  
Controller with Output Tracking  
FEATURES  
DESCRIPTION  
The LTC®3809-1 is a synchronous step-down switching  
regulator controller that drives external complementary  
power MOSFETs using few external components. The  
constantfrequencycurrentmodearchitecturewithMOSFET  
n
Programmable Output Voltage Tracking  
n
No Current Sense Resistor Required  
n
Constant Frequency Current Mode Operation for  
Excellent Line and Load Transient Response  
n
Wide V Range: 2.75V to 9.8V  
V
sensingeliminatestheneedforacurrentsenseresistor  
IN  
DS  
n
Wide V  
Range: 0.6V to V  
and improves efficiency.  
OUT  
IN  
n
n
n
0.6V 1.5% Reference  
Optional Burst Mode operation provides high efficiency  
operation at light loads. 100% duty cycle provides low  
dropout operation, extending operating time in battery-  
poweredsystems.BurstModeisinhibitedwhentheMODE  
pin is pulled low to reduce noise and RF interference.  
Low Dropout Operation: 100% Duty Cycle  
Selectable Burst Mode®/Pulse-Skipping/Forced  
Continuous Operation  
Auxiliary Winding Regulation  
Internal Soft-Start Circuitry  
n
n
n
n
n
n
The LTC3809-1 allows either coincident or ratiometric  
output voltage tracking. Switching frequency is fixed at  
550kHz. Fault protection is provided by an overvoltage  
comparator and a short-circuit current limit comparator.  
Selectable Maximum Peak Current Sense Threshold  
Output Overvoltage Protection  
Micropower Shutdown: I = 9μA  
Q
Tiny Thermally Enhanced Leadless (3mm × 3mm)  
DFN and 10-lead MSOP Packages  
The LTC3809-1 is available in tiny footprint thermally  
enhanced DFN and 10-lead MSOP packages.  
APPLICATIONS  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst  
is a registered trademark of Linear Technology Corporation. No R  
Linear Technology Corporation. All other trademarks are the property of their respective  
owners. Protected by U.S. Patents including 5481178, 5929620, 6580258, 6304066,  
5847554, 6611131, 6498466. Other Patents pending.  
n
is a trademark of  
SENSE  
1- or 2-Cell Lithium-Ion Powered Devices  
n
Notebook and Palmtop Computers, PDAs  
n
Portable Instruments  
Distributed DC Power Systems  
n
TYPICAL APPLICATION  
Efficiency and Power Loss vs Load Current  
High Efficiency, 550kHz Step-Down Converter  
100  
90  
80  
70  
60  
50  
10k  
EFFICIENCY  
V
IN  
2.75V TO 9.8V  
V
= 3.3V  
IN  
10μF  
1k  
V
IN  
IPRG  
V
= 4.2V  
V
= 5V  
IN  
IN  
100  
10  
MODE  
TG  
59k  
LTC3809-1  
2.2μH  
47μF  
V
2.5V  
2A  
OUT  
TYPICAL POWER  
LOSS (V = 4.2V)  
V
SW  
BG  
FB  
15k  
IN  
I
TH  
187k  
RUN  
470pF  
1
GND  
FIGURE 8 CIRCUIT  
V
= 2.5V  
OUT  
38091 TA01  
0.1  
10k  
1
10  
100  
1k  
LOAD CURRENT (mA)  
38091 TA02  
38091fc  
1
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