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LTC3862-1

更新时间： 2023-12-20 18:45:46
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
42页 1592K
描述
多相电流模式升压型 DC/DC 控制器

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中文翻译

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LTC3862-1 数据手册

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LTC3862-1  
Multi-Phase Current Mode  
Step-Up DC/DC Controller  
DescripTion  
FeaTures  
TheLTC®3862-1isatwophaseconstantfrequency,current  
mode boost and SEPIC controller that drives N-channel  
power MOSFETs. Two phase operation reduces system  
filtering capacitance and inductance requirements.  
n
Wide V Range: 8.5V to 36V Operation  
IN  
n
2-Phase Operation Reduces Input and Output  
Capacitance  
n
Fixed Frequency, Peak Current Mode Control  
n
10V Gate Drive for High Voltage MOSFETs  
Theoperatingfrequencycanbesetwithanexternalresistor  
over a 75kHz to 500kHz range and can be synchronized  
to an external clock using the internal PLL. Multi-phase  
operation is possible using the SYNC input, the CLKOUT  
output and the PHASEMODE control pin allowing 2-, 3-,  
4-, 6- or 12-phase operation.  
n
Adjustable Slope Compensation Gain  
n
Adjustable Max Duty Cycle (Up to 96%)  
n
Adjustable Leading Edge Blanking  
n
1ꢀ Internal Voltage Reference  
n
Programmable Operating Frequency with One  
External Resistor (75kHz to 500kHz)  
n
n
Other features include an internal 10V LDO with under-  
voltage lockout protection for the gate drivers, a preci-  
sion RUN pin threshold with programmable hysteresis,  
soft-start and programmable leading edge blanking and  
maximum duty cycle.  
Phase-Lockable Fixed Frequency 50kHz to 650kHz  
SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or  
12-Phase Operation (PHASEMODE Programmable)  
Internal 10V LDO Regulator  
n
n
n
n
24-Lead Narrow SSOP Package  
5mm × 5mm QFN Package with 0.65mm Lead Pitch  
24-Lead Thermally Enhanced TSSOP Package  
PART NUMBER  
LTC3862  
INTV  
V
ON  
V OFF  
IN  
CC  
IN  
5V  
3.3V  
7.5V  
4.4V  
2.9V  
7.0V  
3.9V  
LTC3862-1  
LTC3862-2  
10V  
10V  
applicaTions  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 6144194, 6498466, 6611131.  
Automotive, Telecom and Industrial Power Supplies  
Typical applicaTion  
V
IN  
8.5V TO 36V  
22µF  
50V  
150k  
Efficiency vs Output Current  
56µH  
56µH  
V
OUT  
100  
98  
96  
94  
92  
90  
88  
86  
84  
82  
80  
72V  
V
= 72V  
OUT  
V
24.9k  
IN  
2A (MAX)  
RUN  
INTV  
GATE1  
+
V
= 32V  
IN  
SENSE1  
CC  
110µF  
100V  
4.7µF  
V
= 24V  
0.020Ω  
LTC3862-1  
IN  
–
BLANK  
FREQ  
SYNC  
SENSE1  
45.3k  
GATE2  
+
SENSE2  
V
= 9V  
IN  
PLLFLTR  
0.1µF  
0.020Ω  
SS  
–
SENSE2  
1nF  
3V8  
PGND  
CLKOUT  
SLOPE  
FB  
100  
1000  
10000  
1.5nF  
45.3k  
D
MAX  
LOAD CURRENT (mA)  
38621 TA01b  
ITH  
PHASEMODE  
SGND  
324k  
5.62k  
100pF  
38621 TA01a  
38621fa  
For more information www.linear.com/LTC3862-1  
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