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Datasheet > LTC3891EFE#TRPBF
LTC3891EFE#TRPBF PDF预览

LTC3891EFE#TRPBF

更新时间： 2024-09-13 19:48:59
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
32页 666K
描述
LTC3891 - Low IQ, 60V Synchronous Step-Down Controller; Package: TSSOP; Pins: 20; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3891EFE#TRPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：TSSOP包装说明：HTSSOP, TSSOP20,.25
针数：20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：6.87其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 0.80V TO 24V
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：60 V
最小输入电压：4 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G20JESD-609代码：e3
长度：6.5 mm湿度敏感等级：1
功能数量：1端子数量：20
最高工作温度：85 °C最低工作温度：
标称输出电压：5.1 V封装主体材料：PLASTIC/EPOXY
封装代码：HTSSOP封装等效代码：TSSOP20,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：225认证状态：Not Qualified
座面最大高度：1.2 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：900 kHz技术：CMOS
温度等级：OTHER端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4.5 mmBase Number Matches：1

LTC3891EFE#TRPBF 数据手册

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LTC3891  
Low I , 60V Synchronous  
Q
Step-Down Controller  
FEATURES  
DESCRIPTION  
TheLTC®3891isahighperformancestep-downswitching  
regulator DC/DC controller that drives an all N-channel  
synchronous power MOSFET stage. A constant fre-  
quencycurrentmodearchitectureallowsaphase-lockable  
frequency of up to 750kHz.  
n
Wide V Range: 4V to 60V (65V Abs Max)  
IN  
n
Low Operating I : 50μA  
Q
n
Wide Output Voltage Range: 0.8V ≤ V  
≤ 24V  
OUT  
n
n
n
n
R
SENSE  
or DCR Current Sensing  
Phase-Lockable Frequency (75kHz to 750kHz)  
Programmable Fixed Frequency (50kHz to 900kHz)  
Selectable Continuous, Pulse-Skipping or Low Ripple  
Burst Mode® Operation at Light Load  
The50μAno-loadquiescentcurrentextendsoperatingrun  
timeinbattery-poweredsystems.OPTI-LOOP® compensa-  
tion allows the transient response to be optimized over  
a wide range of output capacitance and ESR values. The  
LTC3891 features a precision 0.8V reference and power  
goodoutputindicator. Awide4Vto60Vinputsupplyrange  
encompasses a wide range of intermediate bus voltages  
andbatterychemistries. TheoutputvoltageoftheLTC3891  
can be programmed between 0.8V to 24V.  
n
n
n
n
n
n
n
n
n
Selectable Current Limit  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Power Good Output Voltage Monitor  
Output Overvoltage Protection  
Low Shutdown I : < 14μA  
Q
Internal LDO Powers Gate Drive from V or EXTV  
IN  
CC  
The TRACK/SS pin ramps the output voltages during  
start-up. Current foldback limits MOSFET heat dissipation  
during short-circuit conditions. The PLLIN/MODE pin se-  
lects among Burst Mode operation, pulse-skipping mode,  
or continuous conduction mode at light loads.  
L, LT, LTC, LTM, OPTI-LOOP, Burst Mode, Linear Technology and the Linear logo are registered  
trademarks of Linear Technology Corporation. All other trademarks are the property of their  
respective owners. Patents, including 5481178, 5705919, 6611131, 6498466, 6580258,  
7230497.  
No Current Foldback During Start-Up  
Small 20-Pin 3mm × 4mm QFN and TSSOP Packages  
APPLICATIONS  
n
Automotive Always-On Systems  
n
Battery Powered Digital Devices  
n
Distributed DC Power Systems  
TYPICAL APPLICATION  
Efficiency and Power Loss vs  
Output Current  
High Efficiency 3.3V Step-Down Converter  
V
IN  
4V TO 60V  
10000  
1000  
100  
100  
90  
80  
70  
60  
50  
40  
30  
20  
V
V
= 12V  
IN  
OUT  
= 3.3V  
22µF  
V
IN  
INTV  
CC  
LTC3891  
2.2µF  
TG  
41.2k  
FREQ  
ITH  
0.1µF  
2200pF  
100pF  
BOOST  
SW  
4.7µH  
10k  
8mΩ  
V
3.3V  
5A  
10  
OUT  
150µF  
BG  
1
0.1µF  
+
10  
0
TRACK/SS  
SGND  
SENSE  
0.1  
10  
–
0.0001 0.001  
0.01  
0.1  
1
100k  
SENSE  
OUTPUT CURRENT (A)  
V
3891 TA01b  
FB  
100k  
INTV  
PGOOD  
CC  
31.6k  
3891 TA01a  
3891fa  
1
1234567...32

中文翻译

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LTC3891EFE#TRPBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3891EFE#PBF Linear

完全替代

 LTC3891 - Low IQ, 60V Synchronous Step-Down Controller; Package: TSSOP; Pins: 20; Temperat

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