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LTC3624 PDF预览

LTC3624

更新时间： 2024-11-22 01:18:27
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 324K
描述
17V, 2A Synchronous Step-Down Regulator with 3.5μA Quiescent Current

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LTC3624 数据手册

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LTC3624/LTC3624-2  
17V, 2A Synchronous  
Step-Down Regulator with  
3.5µA Quiescent Current  
FeaTures  
DescripTion  
n
Wide V Range: 2.7V to 17V  
The LTC®3624/LTC3624-2 is a high efficiency 17V, 2A  
synchronousmonolithicstep-downregulator.Theswitch-  
ing frequency is fixed to 1MHz (LTC3624) or 2.25MHz  
(LTC3624-2) with a 40% synchronization range. The  
regulator features ultralow quiescent current and high  
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 (100% 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  
2A Rated Output Current  
Q
n
n
n
range from 0.6V to V while delivering up to 2A of output  
IN  
1% Output Voltage Accuracy  
Current Mode Operation for Excellent Line and Load  
Transient Response  
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  
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.  
n
n
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  
1MHz  
5V  
applicaTions  
2.25MHz  
2.25MHz  
2.25MHz  
Adjustable  
3.3V  
n
Battery Powered Equipment  
n
Portable Instrumentation  
5V  
n
Emergency Radios  
General Purpose Step-Down Supplies  
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, 6580258,  
6498466, 6611131, 6177787, 5705919, 5847554, 6703692.  
n
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  
36242fd  
1
For more information www.linear.com/LTC3624  
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