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LTC3866EUF#PBF

更新时间： 2024-01-20 16:28:50
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
36页 518K
描述
LTC3866 - Current Mode Synchronous Controller for Sub Milliohm DCR Sensing; Package: QFN; Pins: 24; Temperature Range: -40°C to 85°C

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LTC3866EUF#PBF 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, LCC24,.16SQ,20
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：4.44Samacsys Description：Switching Voltage Regulators Current Mode Synchronous Controller for Very Low Value DCR Sensing
其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6 TO 3.5V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：4.5 V
标称输入电压：15 VJESD-30 代码：S-PQCC-N24
JESD-609代码：e3长度：4 mm
湿度敏感等级：1功能数量：1
端子数量：24最高工作温度：85 °C
最低工作温度：最大输出电流：0.1 A
标称输出电压：5.5 V封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC24,.16SQ,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：850 kHz技术：CMOS
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：4 mmBase Number Matches：1

LTC3866EUF#PBF 数据手册

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LTC3866  
Current Mode Synchronous  
Controller for Sub Milliohm  
DCR Sensing  
FeaTures  
DescripTion  
n
Sub Milliohm DCR Current Sensing  
TheLTC®3866isasinglephasecurrentmodesynchronous  
step-down switching regulator controller that drives all  
N-channel power MOSFET switches. It employs a unique  
architecture which enhances the signal-to-noise ratio of  
the current sense signal, allowing the use of a very low  
DC resistance power inductor to maximize the efficiency  
in high current applications. This feature also reduces the  
switching jitter commonly found in low DCR applications.  
TheLTC3866alsoincludesahighspeedremotesensedif-  
ferentialamplifier,aprogrammablecurrentsense limitthat  
can be selected to 10mV, 15mV, 20mV, 25mV or 30mV,  
andDCRtemperaturecompensationtolimitthemaximum  
output current precisely over temperature.  
n
High Efficiency: Up to 95%  
n
Selectable Current Sensing Limit  
n
Programmable DCR Temperature Compensation  
n
Die Overtemperature Thermal Shutdown  
n
ꢀ05% ꢀ0.6 Output 6oltage Accuracy  
n
Programmable Fixed Frequency 25ꢀkHz to 77ꢀkHz  
n
High Speed Differential Remote Sense Amplifier  
n
Wide Input Voltage Range: 4.5V to 38V  
n
Output Voltage Range: 0.6V to 3.5V with Diffamp  
n
Adjustable Soft-Start or Output Voltage Tracking  
n
Foldback Output Current Limit  
n
Short-Circuit Soft Recovery  
n
Output Overvoltage Protection  
The LTC3866 also features a precise 0.6V reference with a  
guaranteedlimitof 0.5%thatprovidesanaccurateoutput  
voltage from 0.6V to 3.5V. A 4.5V to 38V input voltage  
range allows it to support a wide variety of bus voltages  
and various types of batteries.  
n
24-Lead (4mm × 4mm) QFN and 24-Lead FE Packages  
applicaTions  
n
Computer Systems  
The LTC3866 is offered in a low profile 24-lead 4mm ×  
4mm QFN and 24-lead exposed pad FE packages.  
n
Telecom Systems  
n
Industrial and Medical Instruments  
DC Power Distribution Systems  
n
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are  
registered trademarks and No R  
is a trademark of Analog Devices, Inc. All other  
SENSE  
trademarks are the property of their respective owners. Protected by U.S. Patents, including  
5481178, 5705919, 5929620, 6177787, 6580258, 6498466, 6611131, patent pending.  
Typical applicaTion  
High Efficiency, 1056/3ꢀA Step-Down Converter with 6ery Low DCR Sensing  
Efficiency vs Load Current  
and Mode  
100k  
V
IN  
4.5V TO 20V  
FREQ MODE/PLLIN  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
220µF  
0.1µF  
RUN  
TK/SS  
ITH  
PGOOD  
ITEMP  
4.7µF  
0.1µF  
EXTV  
CC  
LTC3866  
V
V
IN  
FB  
INTV  
DIFFOUT  
DIFFP  
CC  
BOOST  
TG  
0.33µH  
DCR = 0.32mΩ  
V
V
= 12V  
IN  
OUT  
30.1k  
20k  
DIFFN  
= 1.5V  
V
1.5V  
30A  
OUT  
+
L = 0.33µH  
SW  
SNSD  
C1  
(DCR = 0.32mΩ TYP)  
–
C
BG  
OUT  
220pF  
SNS  
220nF  
CCM  
470µF  
R1  
4.64k  
R2  
931Ω  
+
10k  
PGND  
SNSA  
ILIM  
PULSE SKIPPING  
Burst Mode  
OPERATION  
×2  
C2  
220nF  
CLKOUT  
1.5nF  
SGND  
0.01  
0.1  
1
10  
100  
LOAD CURRENT (A)  
3866 TA01b  
3866 TA01a  
3866fc  
1
For more information www.linear.com/LTC3866  
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