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LTC1435AIS#TRMPBF

更新时间： 2024-11-19 20:03:47
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 360K
描述
Switching Controller

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中文翻译

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LTC1435AIS#TRMPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
包装说明：SOP, SOP16,.25Reach Compliance Code：compliant
风险等级：5.66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：30 V最小输入电压：3.5 V
标称输入电压：15 VJESD-30 代码：R-PDSO-G16
长度：9.9 mm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：2 A
最大输出电压：9 V最小输出电压：1.19 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座面最大高度：1.75 mm
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：138 kHz技术：CMOS
温度等级：INDUSTRIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
宽度：3.9116 mmBase Number Matches：1

LTC1435AIS#TRMPBF 数据手册

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LTC1435A  
High Efficiency Low Noise  
Synchronous Step-Down  
Switching Regulator  
U
FEATURES  
DESCRIPTION  
The LTC®1435A is a synchronous step-down switching  
regulator controller that drives external N-channel power  
MOSFETs using a fixed frequency architecture. A wide  
dutycyclerangeof5%to99%allowshighVIN tolowVOUT  
DC/DC conversion, as well as low dropout operation that  
extendsoperatingtimeinbattery-operatedsystems.Burst  
ModeTM operation provides high efficiency at low load  
currents.  
■
Dual N-Channel MOSFET Synchronous Drive  
■
Programmable Fixed Frequency  
■
Wide VIN Range: 3.5V to 36V Operation  
Low Minimum On-Time (≤300ns) for High  
■
Frequency, Low Duty Cycle Applications  
Very Low Dropout Operation: 99% Duty Cycle  
Low Standby Current  
■
■
■
■
■
■
■
■
Secondary Feedback Control  
Programmable Soft Start  
Remote Output Voltage Sense  
Logic Controlled Micropower Shutdown: IQ < 25µA  
Foldback Current Limiting (Optional)  
Current Mode Operation for Excellent Line and Load  
Transient Response  
The operating frequency is set by an external capacitor  
allowing maximum flexibility in optimizing efficiency. A  
secondary winding feedback control pin, SFB, guarantees  
regulation regardless of load on the main output by  
forcing continuous operation. Burst Mode operation is  
inhibited when the SFB pin is pulled low, which reduces  
noise and RF interference.  
■
■
Output Voltages from 1.19V to 9V  
Available in 16-LUead Narrow SO and SSOP Packages  
Soft start is provided by an external capacitor that can be  
used to properly sequence supplies. The operating cur-  
rent level is user-programmable via an external current  
sense resistor. Wide input supply range allows operation  
from 3.5V to 30V (36V maximum).  
APPLICATIONS  
■
Notebook and Palmtop Computers, PDAs  
Cellular Telephones and Wireless Modems  
Portable Instruments  
Battery-Operated Devices  
DC Power Distribution Systems  
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a trademark of Linear Technology Corporation.  
■
■
U
TYPICAL APPLICATION  
V
IN  
4.5V TO 22V  
C
V
IN  
OSC  
C
IN  
+
C
OSC  
43pF  
22µF  
35V  
× 2  
M1  
Si4412DY  
RUN/SS  
TG  
C
R
SS  
0.1µF  
SENSE  
0.033Ω  
V
OUT  
1.6V/3A  
I
SW  
TH  
L1  
C
D
C
B
LTC1435A  
INTV  
4.7µH  
330pF  
CMDSH-3  
R1  
C
C
R
B
OUT  
C
35.7k  
CC  
+
0.1µF  
100µF  
6.3V  
× 2  
10k  
SGND  
BOOST  
R2  
102k  
+
D1  
MBRS140T3  
100pF  
4.7µF  
M2  
Si4412DY  
V
BG  
OSENSE  
PGND  
SENSE  
–
+
SENSE  
1000pF  
1435A F01  
Figure 1. High Efficiency Step-Down Converter  
1
1234567...20

中文翻译

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