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LTC3814EFE-5-PBF

更新时间： 2024-11-29 05:43:55
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
28页 355K
描述
60V Current Mode Synchronous Step-Up Controller

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中文翻译

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LTC3814EFE-5-PBF 数据手册

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LTC3814-5  
60V Current Mode  
Synchronous Step-Up Controller  
FEATURES  
DESCRIPTION  
The LTC3814-5 is a synchronous step-up switching regu-  
lator controller that can generate output voltages up to  
60V. The LTC3814-5 uses a constant off-time peak current  
control architecture to deliver very high duty cycles with  
accurate cycle-by-cycle current limit without requiring a  
sense resistor.  
n
High Output Voltages: Up to 60V  
n
Large 1Ω Gate Drivers  
n
No Current Sense Resistor Required  
n
Dual N-Channel MOSFET Synchronous Drive  
n
0.5ꢀ 0.8V Voltage Reference  
n
Fast Transient Response  
n
Programmable Soft-Start  
A precise internal reference provides 0.5ꢀ ꢁC accuracy.  
A high bandwidth (25MHz) error amplifier provides very  
fast line and load transient response. Large 1Ω gate driv-  
ers allow the LTC3814-5 to drive large power MOSFETs  
for higher current applications. The operating frequency  
is selected by an external resistor and is compensated for  
n
Generates 5.5V ꢁriver Supply  
n
Power Good Output Voltage Monitor  
n
Adjustable Off-Time/Frequency: t  
< 100ns  
OFF(MIN)  
n
n
n
n
Adjustable Cycle-by-Cycle Current Limit  
Undervoltage Lockout On ꢁriver Supply  
Output Overvoltage Protection  
variations in V . A shutdown pin allows the LTC3814-5 to  
IN  
Thermally Enhanced 16-Pin TSSOP Package  
be turned off reducing the supply current to <230μA.  
PARAMETER  
Maximum V  
LTC3813  
100V  
LTC3814-5  
60V  
APPLICATIONS  
OUT  
MOSFET Gate ꢁrive  
6.35V to 14V  
6.2V  
4.5V to 14V  
4.2V  
n
24V Fan Supplies  
+
INTV UV  
n
CC  
48V Telecom and Base Station Power Supplies  
Networking Equipment, Servers  
–
n
INTV UV  
6V  
4V  
CC  
n
Automotive and Industrial Control Systems  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 5481178, 5847554, 6304066, 6476589, 6580258, 6677210, 6774611.  
TYPICAL APPLICATION  
Efficiency vs Load Current  
High Efficiency High Voltage Step-Up Converter  
100  
263k  
V
= 12V  
V
IN  
V
IN  
4.5V TO 14V  
OUT  
I
NꢁRV  
OFF  
100k  
+
95  
90  
85  
80  
22μF  
BOOST  
PGOOꢁ  
LTC3814-5  
V
4.7μH  
PGOOꢁ  
TG  
RNG  
M1  
Si7848ꢁP  
V
= 5V  
IN  
0.1μF  
V
24V  
4A  
OUT  
V
OFF  
SW  
EXTV  
CC  
RUN/SS  
INTV  
CC  
1000pF  
0.01μF  
ꢁ1  
I
TH  
29.4k  
1k  
MBR1100  
M2  
Si7848ꢁP  
+
BG  
270μF  
× 2  
100k  
V
PGNꢁ  
FB  
SGNꢁ  
2
3
0
4
1
100pF  
1μF  
LOAꢁ (A)  
38145 TA01b  
38145 TA01  
38145fb  
1
1234567...28

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