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LTC1735EGN#TR PDF预览

LTC1735EGN#TR

更新时间： 2024-01-14 04:55:16
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
28页 373K
描述
LTC1735 - High Efficiency Synchronous Step-Down Switching Regulator; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C

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中文翻译

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LTC1735EGN#TR 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SOIC包装说明：SOP, SOP16,.25
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.06模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE最大输入电压：36 V
最小输入电压：4 V标称输入电压：15 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：9.9 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：3 A最大输出电压：6 V
最小输出电压：0.8 V封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP16,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：250认证状态：Not Qualified
座面最大高度：1.752 mm表面贴装：YES
切换器配置：BUCK最大切换频率：335 kHz
技术：CMOS温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3.9 mm
Base Number Matches：1

LTC1735EGN#TR 数据手册

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LTC3808  
No RSENSETM, Low EMI,  
Synchronous DC/DC Controller  
with Output Tracking  
U
FEATURES  
DESCRIPTIO  
The LTC®3808 is a synchronous step-down switching  
regulator controller that drives external complementary  
power MOSFETs using few external components. The  
constantfrequencycurrentmodearchitecturewithMOSFET  
VDS sensing eliminates the need for a current sense  
resistor and improves efficiency.  
■
Programmable Output Voltage Tracking  
■
Sense Resistor Optional  
■
Spread Spectrum Modulation for Low Noise  
■
Constant Frequency Current Mode Operation for  
Excellent Line and Load Transient Response  
■
Wide VIN Range: 2.75V to 9.8V  
■
Wide VOUT Range: 0.6V to VIN  
Burst Mode operation provides high efficiency operation  
at light loads. 100% duty cycle provides low dropout  
operation, extending operating time in battery-powered  
systems.  
■
0.6V ±1.5% Reference  
■
Low Dropout Operation: 100% Duty Cycle  
■
True PLL for Frequency Locking or Adjustment  
(Frequency Range: 250kHz to 750kHz)  
Selectable Burst Mode®/Pulse Skipping/Forced  
■
Theswitchingfrequencycanbeprogrammedupto750kHz,  
allowing the use of small surface mount inductors and  
capacitors. For noise sensitive applications, the LTC3808  
can be externally synchronized from 250kHz to 750kHz.  
Burst Mode is inhibited during synchronization or when  
the SYNC/MODE pin is pulled low to reduce noise and RF  
interference.TofurtherreduceEMI,theLTC3808incorpo-  
rates a novel spread spectrum frequency modulation  
technique.  
Continuous Operation  
■
■
■
■
■
■
Auxiliary Winding Regulation  
Internal Soft-Start Circuitry  
Power Good Output Voltage Monitor  
Output Overvoltage Protection  
Micropower Shutdown: IQ = 9µA  
Tiny Thermally Enhanced Leadless (4mm × 3mm)  
DFN or 16-lead SSOP Package  
U
The LTC3808 is available in the tiny footprint thermally  
enhanced DFN package or 16-lead SSOP package.  
, LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode  
is a registered trademark of Linear Technology Corporation. No RSENSE is a trademark of  
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.  
APPLICATIO S  
■
One or Two Cell Lithium-Ion Powered Devices  
Notebook and Palmtop Computers, PDAs  
Portable Instruments  
Distributed DC Power Systems  
■
■
■
U
Efficiency and Power Loss vs Load Current  
TYPICAL APPLICATIO  
100  
90  
80  
70  
60  
50  
10k  
EFFICIENCY  
High Efficiency, 550kHz Step-Down Converter  
V
= 3.3V  
IN  
V
1k  
IN  
2.75V TO 9.8V  
V
= 4.2V  
IN  
V
IN  
= 5V  
10µF  
1M  
LTC3808  
V
IN  
+
100  
10  
PLLLPF  
SENSE  
SYNC/MODE  
PGOOD  
TYPICAL POWER  
LOSS (V = 4.2V)  
TG  
IN  
59k  
2.2µH  
47µF  
V
OUT  
V
SW  
2.5V  
2A  
FB  
15k  
+
1
I
TH  
BG  
187k  
FIGURE 11 CIRCUIT  
RUN  
IPRG  
220pF  
V
= 2.5V  
OUT  
GND  
0.1  
10k  
1
10  
100  
1k  
3808 TA01  
LOAD CURRENT (mA)  
3808 TA01b  
3808f  
1
1234567...28

中文翻译

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