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LTC3103

更新时间： 2024-11-13 11:45:59
品牌 Logo 应用领域
Linear Systems 转换器
页数 文件大小 规格书
26页 260K
描述
High Efficiency, 65V 500mA Synchronous Step-Down Converter

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LTC3103 数据手册

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LTC3630  
High Efficiency, 65V  
500mA Synchronous  
Step-Down Converter  
FEATURES  
DESCRIPTION  
The LTC®3630 is a high efficiency step-down DC/DC  
converter with internal high side and synchronous power  
switches that draws only 12μA typical DC supply current  
while maintaining a regulated output voltage at no load.  
n
Wide Operating Input Voltage Range: 4V to 65V  
n
Synchronous Operation for Highest Efficiency  
n
Internal High Side and Low Side Power MOSFETs  
n
No Compensation Required  
n
Adjustable 50mA to 500mA Maximum Output Current  
The LTC3630 can supply up to 500mA load current and  
features a programmable peak current limit that provides  
a simple method for optimizing efficiency and for reduc-  
ing output ripple and component size. The LTC3630’s  
combination of Burst Mode® operation, integrated power  
switches, low quiescent current, and programmable peak  
current limit provides high efficiency over a broad range  
of load currents.  
n
Low Dropout Operation: 100% Duty Cycle  
Low Quiescent Current: 12ꢀA  
Wide Output Range: 0.8V to V  
n
n
IN  
n
n
n
n
n
n
0.8V 1% Feedback Voltage Reference  
Precise RUN Pin Threshold  
Internal and External Soft-Start  
Programmable 1.8V, 3.3V, 5V or Adjustable Output  
Few External Components Required  
Low Profile (0.75mm) 3mm × 5mm DFN and  
Thermally-Enhanced MSE16 Packages  
With its wide input range of 4V to 65V, the LTC3630 is a  
robust converter suited for regulating a wide variety of  
powersources.Additionally,theLTC3630includesaprecise  
run threshold and soft-start feature to guarantee that the  
power system start-up is well-controlled in any environ-  
ment. A feedback comparator output enables multiple  
LTC3630s to be paralleled in higher current applications.  
APPLICATIONS  
n
Industrial Control Supplies  
n
Medical Devices  
n
Distributed Power Systems  
n
Portable Instruments  
The LTC3630 is available in the thermally-enhanced  
3mm × 5mm DFN and the MSE16 packages.  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
Battery-Operated Devices  
n
Automotive  
Avionics  
n
TYPICAL APPLICATION  
Efficiency vs Load Current  
100  
V
= 3.3V  
OUT  
V
= 12V  
IN  
4V to 65V Input to 3.3V Output, 500mA Step-Down Converter  
90  
80  
70  
60  
50  
40  
30  
47ꢀH  
V
OUT  
V
IN  
3.3V  
V
SW  
LTC3630  
RUN  
IN  
4V TO 65V  
100ꢀF  
w2  
500mA  
2.2ꢀF  
V
= 65V  
IN  
V
FB  
SS  
V
PRG1  
V
PRG2  
FBO  
I
SET  
GND  
3630 TA01a  
I
I
= 220kΩ||220pF  
= OPEN  
SET  
SET  
0.1  
1
10  
100  
1000  
LOAD CURRENT (mA)  
3630 TA01b  
3630fb  
1
1234567...26

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