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LTC3851AEGN#PBF

更新时间： 2024-02-17 23:58:37
品牌 Logo 应用领域
凌特 - Linear 开关控制器
页数 文件大小 规格书
28页 321K
描述
LTC3851A - Synchronous Step-Down Switching Regulator Controller; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3851AEGN#PBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：HVQCCN,
针数：16Reach Compliance Code：compliant
风险等级：5.14其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 5.5V
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：38 V
最小输入电压：4 V标称输入电压：15 V
JESD-30 代码：S-PQCC-N16JESD-609代码：e3
长度：3 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：
最大输出电流：0.05 A封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：250
认证状态：Not Qualified座面最大高度：0.8 mm
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：790 kHz温度等级：OTHER
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

LTC3851AEGN#PBF 数据手册

 浏览型号LTC3851AEGN#PBF的Datasheet PDF文件第2页浏览型号LTC3851AEGN#PBF的Datasheet PDF文件第3页浏览型号LTC3851AEGN#PBF的Datasheet PDF文件第4页浏览型号LTC3851AEGN#PBF的Datasheet PDF文件第5页浏览型号LTC3851AEGN#PBF的Datasheet PDF文件第6页浏览型号LTC3851AEGN#PBF的Datasheet PDF文件第7页 
LTC3851  
Synchronous  
Step-Down Switching  
Regulator Controller  
FEATURES  
DESCRIPTION  
The LTC®3851 is a high performance synchronous  
step-down switching regulator controller that drives  
an all N-channel synchronous power MOSFET stage. A  
constant frequency current mode architecture allows a  
phase-lockable frequency of up to 750kHz.  
n
Wide V Range: 4V to 38V Operation  
SENSE  
±±1 Output Voltage Accuracy  
IN  
n
R
or DCR Current Sensing  
n
n
n
n
n
n
n
n
n
n
Phase-Lockable Fixed Frequency: 250kHz to 750kHz  
Dual N-Channel MOSFET Synchronous Drive  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Output Current Foldback Limiting  
OPTI-LOOP compensation allows the transient response  
to be optimized over a wide range of output capacitance  
and ESR values. The LTC3851 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  
continuousinductorcurrentmodeatlightloadsandallows  
the IC to be synchronized to an external clock.  
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  
16-Lead Narrow SSOP or 3mm × 3mm QFN Package  
APPLICATIONS  
, LT, LTC, LTM, Burst Mode and OPTI-LOOP are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 5408150, 5481178, 5705919, 5929620, 6304066,  
6498466, 6580258, 6611131.  
n
Automotive Systems  
n
Telecom Systems  
n
Industrial Equipment  
Distributed DC Power Systems  
n
TYPICAL APPLICATION  
High Efficiency Synchronous Step-Down Converter  
Efficiency and Power Loss  
vs Load Current  
V
IN  
I
V
LIM  
IN  
100  
95  
10000  
1000  
100  
4V TO 38V  
150μF  
V
V
= 12V  
IN  
OUT  
FREQ/PLLFLTR TG  
= 3.3V  
0.68μH  
10k  
V
3.3V  
10A  
OUT  
RUN  
SW  
90  
EFFICIENCY  
LTC3851  
0.22μF  
85  
TK/SS  
BOOST  
330μF  
0.1μF  
80  
75  
INTV  
CC  
10nF  
1k  
POWER LOSS  
70  
65  
60  
55  
50  
BG  
I
TH  
GND  
100pF  
+
SENSE  
PLLIN/MODE  
SENSE  
0.22μF  
13k  
–
62.5k  
20k  
10  
10000  
10  
100  
1000  
V
FB  
LOAD CURRENT (mA)  
3851TA01b  
3851 TA01a  
3851f  
1
1234567...28

中文翻译

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LTC3851AEGN#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3851AEGN#TRPBF Linear

类似代替

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

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