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LTC1735

更新时间： 2024-02-06 14:46:03
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
32页 375K
描述
High Efficiency Synchronous Step-Down Switching Regulator

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中文翻译

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LTC1735 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

LTC1735 数据手册

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LTC1735  
High Efficiency  
Synchronous Step-Down  
Switching Regulator  
U
FEATURES  
DESCRIPTIO  
The LTC®1735 is a synchronous step-down switching  
regulator controller that drives external N-channel power  
MOSFETs using a fixed frequency architecture. Burst  
ModeTM operation provides high efficiency at low load  
currents. The precision 0.8V reference is compatible with  
future microprocessor generations. OPTI-LOOP compen-  
sation allows the transient response to be optimized over  
a wide range of output capacitance and ESR values.  
■
Dual N-Channel MOSFET Synchronous Drive  
■
Synchronizable/Programmable Fixed Frequency  
■
Wide VIN Range: 3.5V to 36V Operation  
■
VOUT Range: 0.8V to 6V  
OPTI-LOOPTM Compensation Minimizes COUT  
■
■
±
1% Output Voltage Accuracy  
■
■
■
Internal Current Foldback  
Output Overvoltage Crowbar Protection  
Latched Short-Circuit Shutdown Timer  
with Defeat Option  
The operating frequency (synchronizable up to 500kHz) is  
set by an external capacitor allowing maximum flexibility  
in optimizing efficiency. A forced continuous control pin  
reduces noise and RF interference and can assist second-  
ary winding regulation by disabling Burst Mode operation  
when the main output is lightly loaded.  
■
■
■
■
■
■
Very Low Dropout Operation: 99% Duty Cycle  
Forced Continuous Control Pin  
Optional Programmable Soft-Start  
Remote Output Voltage Sense  
Logic Controlled Micropower Shutdown: IQ < 25µA  
LTC1435 Pin Compatible with  
Minor Component Changes  
Protection features include internal foldback current lim-  
iting, output overvoltage crowbar and optional short-  
circuit shutdown. Soft-start is provided by an external  
capacitor that can be used to properly sequence supplies.  
The operating current level is user-programmable via an  
external current sense resistor. Wide input supply range  
allows operation from 3.5V to 30V (36V maximum).  
■
Available in 16-LUead Narrow SSOP and SO Packages  
APPLICATIO S  
■
Notebook and Palmtop Computers, PDAs  
■
Cellular Telephones and Wireless Modems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode and OPTI-LOOP are trademarks of Linear Technology Corporation.  
■
DC Power Distribution Systems  
U
TYPICAL APPLICATIO  
V
IN  
5V TO 24V  
C
C
OSC  
IN  
22µF  
M1  
FDS6680A  
C
OSC  
47pF  
TG  
BOOST  
SW  
50V  
C
B
0.22µF  
RUN/SS  
C
C
: PANASONIC EEFUEOG181R  
C
OUT  
SS  
0.1µF  
: MARCON THCR70E1H226ZT  
IN  
I
TH  
L1: PANASONIC ETQP6FZR0HFA  
R
: IRC LRF2010-01-R005J  
SENSE  
C
C
330pF  
LTC1735  
L1  
2µH  
C
R
C2  
100pF  
SENSE  
R
C
D
B
CMDSH-3  
V
1.6V  
9A  
0.005Ω  
OUT  
33k  
V
IN  
SGND  
100pF  
INTV  
R1  
20k  
1%  
CC  
+
C
V
4.7µF  
OUT  
OSENSE  
180µF  
4V  
+
M2  
FDS6680A  
D1  
MBRS340T3  
BG  
–
×4  
SP  
R2  
20k  
1%  
SENSE  
1000pF  
PGND  
+
SENSE  
1735 F01  
Figure 1. High Efficiency Step-Down Converter  
1
1234567...32

中文翻译

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