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LTC3851AIUD-1#TRPBF PDF预览

LTC3851AIUD-1#TRPBF

更新时间： 2024-09-23 14:34:15
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
30页 424K
描述
LTC3851A-1 - Synchronous Step-Down Switching Regulator Controller; Package: QFN; Pins: 16; Temperature Range: -40°C to 85°C

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LTC3851AIUD-1#TRPBF 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC16,.12SQ,20
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13Is Samacsys：N
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 VJESD-30 代码：S-PQCC-N16
JESD-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：125 °C
最低工作温度：-40 °C最大输出电流：0.05 A
标称输出电压：5 V封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC16,.12SQ,20
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）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：0.8 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：810 kHz技术：CMOS
温度等级：AUTOMOTIVE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 mmBase Number Matches：1

LTC3851AIUD-1#TRPBF 数据手册

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LTC3851A-1  
Synchronous  
Step-Down Switching  
Regulator Controller  
FeaTures  
DescripTion  
The LTC®3851A-1 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  
n
Wide V Range: 4V to 38V Operation  
SENSE  
±±1 Output Voltage Accuracy  
Power Good Output Voltage Monitor  
IN  
n
R
or DCR Current Sensing  
n
n
n
n
n
n
n
n
n
n
Phase-Lockable Fixed Frequency: 250kHz to 750kHz phase-lockable frequency of up to 750kHz.  
Dual N-Channel MOSFET Synchronous Drive  
OPTI-LOOP compensation allows the transient response  
Very Low Dropout Operation: 99% Duty Cycle  
to be optimized over a wide range of output capacitance  
Adjustable Output Voltage Soft-Start or Tracking  
andESRvalues.TheLTC3851A-1featuresaprecision0.8V  
Output Current Foldback Limiting  
reference and a power good indicator. A wide 4V to 38V  
Output Overvoltage Protection  
(40Vabsolutemaximum)inputsupplyrangeencompasses  
OPTI-LOOP® Compensation Minimizes C  
OUT  
mostbatteryconfigurationsandintermediatebusvoltages.  
Selectable Continuous, Pulse-Skipping or  
Burst Mode® Operation at Light Loads  
TheTK/SSpinrampstheoutputvoltageduringstart-upand  
n
n
n
shutdown with coincident or ratiometric tracking. Current  
foldback limits MOSFET heat dissipation during short-  
circuit conditions. The MODE/PLLIN pin selects among  
Burst Mode operation, pulse-skipping mode or continu-  
ous inductor current mode at light loads and allows the IC  
to be synchronized to an external clock. The LTC3851A-1  
contains an improved PLL compared to the LTC3851-1.  
Low Shutdown I : 20µA  
Q
V
Range: 0.8V to 5.5V  
OUT  
Thermally Enhanced 16-Lead MSOP  
or 3mm × 3mm QFN Package  
applicaTions  
n
Automotive Systems  
The LTC3851A-1 is identical to the LTC3851A except that  
the I pin is replaced by PGOOD.  
n
Telecom Systems  
LIM  
n
Industrial Equipment  
Distributed DC Power Systems  
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are registered  
n
trademarks and No R , UltraFast are trademarks of Linear Technology Corporation. All other  
SENSE  
trademarks are the property of their respective owners. Protected by U.S. Patents including  
5408150, 5481178, 5705919, 5929620, 6304066, 6498466, 6580258, 6611131.  
Typical applicaTion  
Efficiency and Power Loss  
vs Load Current  
High Efficiency Synchronous Step-Down Converter  
100k  
V
IN  
4.5V TO 38V  
100  
95  
10000  
1000  
100  
PGO0D  
FREQ/PLLFLTR TG  
INTV  
V
CC  
IN  
V
V
= 12V  
IN  
OUT  
22µF  
= 3.3V  
0.68µH  
3.01k  
V
3.3V  
15A  
EFFICIENCY  
OUT  
0.1µF  
90  
82.5k  
RUN  
SW  
LTC3851A-1  
0.1µF  
85  
TK/SS  
BOOST  
330µF  
×2  
80  
75  
0.1µF  
POWER LOSS  
INTV  
CC  
2200pF  
70  
65  
60  
55  
50  
4.7µF  
BG  
I
TH  
GND  
15k  
330pF  
+
SENSE  
MODE/PLLIN  
SENSE  
0.047µF  
30.1k  
10  
–
154k  
10  
100  
1000  
10000  
100000  
V
FB  
LOAD CURRENT (mA)  
3851A1 TA01b  
48.7k  
3851A1 TA01a  
3851a1fa  
1
1234567...30

中文翻译

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LTC3851AIUD-1#TRPBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3851AIUD-1#PBF Linear

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