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LTC3851AIMSE#PBF PDF预览

LTC3851AIMSE#PBF

更新时间： 2024-01-16 19:59:53
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
30页 422K
描述
LTC3851A - Synchronous Step-Down Switching Regulator Controller; Package: MSOP; Pins: 16; Temperature Range: -40°C to 85°C

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LTC3851AIMSE#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：MSOP包装说明：HTSSOP, TSSOP16,.19,20
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.48其他特性：ALSO OPERATES AS LDO REGULATOR, OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 5.5V
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：38 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：4.039 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：0.005 A封装主体材料：PLASTIC/EPOXY
封装代码：HTSSOP封装等效代码：TSSOP16,.19,20
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：225认证状态：Not Qualified
座面最大高度：1.1 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BUCK
最大切换频率：810 kHz技术：CMOS
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.5 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 mmBase Number Matches：1

LTC3851AIMSE#PBF 数据手册

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LTC3851A  
Synchronous  
Step-Down Switching  
Regulator Controller  
FeaTures  
DescripTion  
The LTC®3851A is a high performance synchronous  
step-down switching regulator controller that drives  
an all N-channel synchronous power MOSFET stage. A  
n
Wide V Range: 4V to 38V Operation  
SENSE  
±±1 Output Voltage Accuracy  
Phase-Lockable Fixed Frequency: 250kHz to 750kHz constant frequency current mode architecture allows a  
IN  
n
R
or DCR Current Sensing  
n
n
n
n
n
n
n
n
n
n
Dual N-Channel MOSFET Synchronous Drive  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Output Current Foldback Limiting  
phase-lockable frequency of up to 750kHz.  
OPTI-LOOP compensation allows the transient response  
to be optimized over a wide range of output capacitance  
and ESR values. The LTC3851A features a precision 0.8V  
reference that is compatible with a wide 4V to 38V input  
supply range.  
Output Overvoltage Protection  
5V Internal Regulator  
OPTI-LOOP® Compensation Minimizes C  
OUT  
The TK/SS pin ramps the output voltage during start-up.  
Current foldback limits MOSFET heat dissipation during  
short-circuit conditions. The MODE/PLLIN pin selects  
among Burst Mode operation, pulse-skipping mode or  
continuous inductor current mode at light loads and al-  
lows the IC to be synchronized to an external clock. The  
LTC3851A contains an improved PLL compared to the  
LTC3851.  
Selectable Continuous, Pulse-Skipping or  
Burst Mode® Operation at Light Loads  
n
n
n
Low Shutdown I : 20µA  
Q
V
Range: 0.8V to 5.5V  
OUT  
Thermally Enhanced 16-Lead MSOP, 16-Lead Narrow  
SSOP or 3mm × 3mm QFN Package  
applicaTions  
n
Automotive Systems  
The LTC3851A-1 is a version with a power good output  
signal instead of adjustable current limit.  
n
Telecom Systems  
n
Industrial Equipment  
Distributed DC Power Systems  
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are registered  
trademarks and No R , UltraFast are trademarks of Linear Technology Corporation. All other  
SENSE  
n
trademarks are the property of their respective owners. Protected by U.S. Patents including  
5408150, 5481178, 5705919, 5929620, 6304066, 6498466, 6580258, 6611131.  
Typical applicaTion  
High Efficiency Synchronous Step-Down Converter  
Efficiency and Power Loss  
vs Load Current  
V
IN  
4.5V TO 36V  
I
V
LIM  
IN  
100  
95  
10000  
1000  
100  
22µF  
V
V
= 12V  
IN  
OUT  
FREQ/PLLFLTR TG  
= 3.3V  
0.68µH  
3.01k  
V
3.3V  
15A  
OUT  
0.1µF  
82.5k  
RUN  
LTC3851A  
SW  
90  
EFFICIENCY  
0.1µF  
85  
TK/SS  
BOOST  
330µF  
×2  
0.1µF  
80  
75  
POWER LOSS  
INTV  
CC  
2200pF  
4.7µF  
70  
65  
60  
55  
50  
BG  
I
TH  
GND  
330pF  
15k  
+
SENSE  
MODE/PLLIN  
SENSE  
0.047µF  
30.1k  
–
154k  
10  
10  
100  
1000  
10000  
100000  
V
FB  
LOAD CURRENT (mA)  
48.7k  
3851A TA01b  
3851A TA01a  
3851afa  
1
1234567...30

中文翻译

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LTC3851AIMSE#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3851AEMSE#TRPBF Linear

完全替代

 LTC3851A - Synchronous Step-Down Switching Regulator Controller; Package: MSOP; Pins: 16;

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