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LTC3624-2_15 PDF预览

LTC3624-2_15

更新时间： 2024-11-26 01:20:51
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 369K
描述
17V, 2A Synchronous Step-Down Regulator with 3.5A Quiescent Current

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LTC3624-2_15 数据手册

 浏览型号LTC3624-2_15的Datasheet PDF文件第2页浏览型号LTC3624-2_15的Datasheet PDF文件第3页浏览型号LTC3624-2_15的Datasheet PDF文件第4页浏览型号LTC3624-2_15的Datasheet PDF文件第5页浏览型号LTC3624-2_15的Datasheet PDF文件第6页浏览型号LTC3624-2_15的Datasheet PDF文件第7页 
LTC3624/LTC3624-2  
17V, 2A Synchronous  
Step-Down Regulator with  
3.5µA Quiescent Current  
FeaTures  
DescripTion  
The LTC®3624/LTC3624-2 is a high efficiency 17V, 2A  
synchronousmonolithicstep-downregulator.Theswitch-  
ing frequency is fixed to 1MHz (LTC3624) or 2.25MHz  
(LTC3642-2) with a 4ꢀ0 synchronization range. The  
regulator features ultralow quiescent current and high  
n
Wide V Range: 2.7V to 17V  
IN  
n
Wide V  
Range: 0.6V to V  
OUT  
IN  
n
n
n
n
n
95% Max Efficiency  
Low I : 3.5µA, Zero-Current Shutdown  
Q
Constant Frequency (1MHz/2.25MHz)  
Fixed V  
Options Available  
efficiency over a wide V  
range.  
OUT  
OUT  
Low Dropout Operation (1ꢀꢀ0 Duty Cycle) with  
The step-down regulator operates from an input voltage  
range of 2.7V to 17V and provides an adjustable output  
Ultralow I  
Q
n
n
n
2A Rated Output Current  
range from ꢀ.6V to V while delivering up to 2A of output  
IN  
10 Output Voltage Accuracy  
current. A user-selectable mode input is provided to allow  
the user to trade off ripple noise for light load efficiency;  
Burst Mode operation provides the highest efficiency at  
lightloads,whilepulse-skippingmodeprovidesthelowest  
voltage ripple. The MODE pin can also be used to sync the  
switching frequency to an external clock.  
Current Mode Operation for Excellent Line and Load  
Transient Response  
n
n
Synchronizable to External Clock  
Pulse-Skipping, Forced Continuous, Burst Mode®  
Operation  
Internal Compensation and Soft-Start  
Overtemperature Protection  
Compact 8-Lead DFN (3mm × 3mm) Package  
n
n
n
LTC3624/LTC3624-2 Options  
PART NAME  
FREQUENCY  
V
OUT  
LTC3624  
1MHz  
Adjustable  
3.3V  
LTC3624-3.3  
LTC3624-5  
LTC3624-2  
LTC3624-23.3  
LTC3624-25  
1MHz  
applicaTions  
1MHz  
5V  
n
Battery Powered Equipment  
2.25MHz  
2.25MHz  
2.25MHz  
Adjustable  
3.3V  
n
Portable Instrumentation  
n
Emergency Radios  
General Purpose Step-Down Supplies  
5V  
n
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents, including 5481178, 658ꢀ258,  
6498466, 6611131, 6177787, 57ꢀ5919, 5847554, 67ꢀ3692.  
Typical applicaTion  
Efficiency and Power Loss vs Load  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0
5V VOUT with 800mA Burst Clamp, fSW = 1MHz  
V
= 5V  
OUT  
3.3µH  
V
5V  
2A  
OUT  
V
IN  
5.6V TO 17V  
V
SW  
LTC3624-5  
RUN  
MODE/SYNC  
INTV  
BURST MODE OPERATION  
IN  
10µF  
FB  
47µF  
36242 TA01a  
CC  
GND  
2.2µF  
V
V
V
= 12V  
= 8V  
= 6V  
IN  
IN  
IN  
FREQ = 1MHz  
2
1.5  
0
0.5  
1
LOAD CURRENT (A)  
3624 TA01b  
36242fc  
1
For more information www.linear.com/LTC3624  
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