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LTC1775IS PDF预览

LTC1775IS

更新时间： 2024-11-22 22:55:51
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
24页 292K
描述
High Power No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator

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中文翻译

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LTC1775IS 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：SOIC包装说明：SOP, SOP16,.25
针数：16Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.09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：36 V最小输入电压：4 V
标称输入电压：15 VJESD-30 代码：R-PDSO-G16
JESD-609代码：e0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：2 A
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）：235
认证状态：Not Qualified座面最大高度：1.75 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：165 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：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：3.9 mm
Base Number Matches：1

LTC1775IS 数据手册

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LTC1775  
High Power  
No R  
TM Current Mode  
SENSE  
Synchronous Step-Down  
Switching Regulator  
U
DESCRIPTIO  
FEATURES  
The LTC®1775 is a synchronous step-down switching  
regulator controller that drives external N-channel power  
MOSFETs using few external components. Current mode  
control with MOSFET VDS sensing eliminates the need for  
a sense resistor and improves efficiency. Largely similar  
to the LTC1625, the LTC1775 has twice the maximum  
sensevoltageforhighcurrentapplications. Thefrequency  
of a nominal 150kHz internal oscillator can be synchro-  
nized to an external clock over a 1.5:1 frequency range.  
Burst ModeTM operation at low load currents reduces  
switchinglossesandlowdropoutoperationextendsoper-  
ating time in battery-powered systems. A forced continu-  
ous mode control pin can assist secondary winding  
regulation by disabling Burst Mode operation when the  
main output is lightly loaded.  
■
Highest Efficiency Current Mode Controller  
■
No Sense Resistor Required  
■
300mV Maximum Current Sense Voltage  
■
Stable High Current Operation  
■
Dual N-Channel MOSFET Synchronous Drive  
■
Wide VIN Range: 4V to 36V  
■
Wide VOUT Range: 1.19V to VIN  
■
±1% 1.19V Reference  
■
Programmable Fixed Frequency with Injection Lock  
■
Very Low Drop Out Operation: 99% Duty Cycle  
■
Forced Continuous Mode Control Pin  
■
Optional Programmable Soft Start  
■
Pin Selectable Output Voltage  
■
Foldback Current Limit  
■
Output Overvoltage Protection  
■
Logic Controlled Micropower Shutdown: IQ < 30µA  
Fault protection is provided by foldback current limiting  
and an output overvoltage comparator. An external ca-  
pacitor attached to the RUN/SS pin provides soft start  
capability for supply sequencing. A wide supply range  
allowsoperationfrom4V(4.3VforLTC1775I)to36Vatthe  
input and 1.19V to VIN at the output.  
■
Available in 16-Lead Narrow SSOP and SO Packages  
U
APPLICATIO S  
■
Notebook Computers  
■
Automotive Electronics  
■
Battery Chargers  
Distributed Power Systems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
No RSENSE and Burst Mode are trademarks of Linear Technology Corporation.  
■
U
TYPICAL APPLICATION  
Efficiency vs Load Current  
100  
LTC1775  
V
IN  
V
= 10V  
f = 150kHz  
FCB = INTV  
IN  
5V TO  
28V  
SYNC  
V
IN  
V
OUT  
= 5V  
C
IN  
+
C
0.1µF  
95  
90  
85  
80  
75  
70  
SS  
TK  
CC  
22µF  
30V  
×4  
M1  
RUN/SS  
TG  
SUD50N03-10  
L1  
6µH  
V
= 3.3V  
OUT  
V
3.3V  
10A  
OUT  
V
SW  
PROG  
C
0.33µF  
B
BOOST  
+
C
OUT  
D1  
MBRS340  
R
C
D
B
680µF  
10k  
CMDSH-3  
6.3V  
I
INTV  
CC  
TH  
C
C
2.2nF  
M2  
SGND  
BG  
SUD50N03-10  
+
C
VCC  
4.7µF  
V
PGND  
OSENSE  
1775 F01  
0.01  
0.1  
1
10  
LOAD CURRENT (A)  
Figure 1. High Efficiency Step-Down Converter  
1775 F01b  
1
1234567...24

中文翻译

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LTC1775IS 替代型号

型号 品牌 替代类型 描述 数据表
LTC1775CS#PBF Linear

类似代替

 LTC1775 - High Power No RSENSE Current Mode Synchronous Step-Down Switching Regulator; Pac
LTC1775CS Linear

类似代替

 High Power No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator

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