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LTM4609EV

更新时间： 2024-12-01 05:44:07
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
24页 293K
描述
36VIN, 34VOUT High Effi ciency Buck-Boost DC/DC μModule

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中文翻译

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LTM4609EV 数据手册

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LTM4609  
36V , 34V High Efficiency  
IN  
OUT  
Buck-Boost DC/DC µModule  
FEATURES  
DESCRIPTION  
The LTM®4609 is a high efficiency switching mode buck-  
boost power supply. Included in the package are the  
switchingcontroller,powerFETsandsupportcomponents.  
Operating over an input voltage range of 4.5V to 36V, the  
LTM4609 supports an output voltage range of 0.8V to  
34V, set by a resistor. This high efficiency design delivers  
up to 4A continuous current in boost mode (10A in buck  
mode). Only the inductor, sense resistor, bulk input and  
output capacitors are needed to finish the design.  
n
Single Inductor Architecture Allows V Above,  
IN  
Below or Equal to V  
OUT  
n
Wide V Range: 4.5V to 36V  
IN  
OUT  
n
Wide V  
OUT  
Range: 0.8V to 34V  
n
n
n
n
n
n
n
n
n
I
: 4A DC (10A DC in Buck Mode)  
Up to 98% Efficiency  
Current Mode Control  
Power Good Output Signal  
Phase-Lockable Fixed Frequency: 200kHz to 400kHz  
Ultrafast Transient Response  
Current Foldback Protection  
Output Overvoltage Protection  
Small, Low Profile Surface Mount LGA Package  
(15mm × 15mm × 2.8mm)  
Thelowprofilepackageenablesutilizationofunusedspace  
on the bottom of PC boards for high density point of load  
regulation. The high switching frequency and current  
mode architecture enable a very fast transient response  
to line and load changes without sacrificing stability. The  
LTM4609 can be frequency synchronized with an external  
clock to reduce undesirable frequency harmonics.  
APPLICATIONS  
n
Faultprotectionfeaturesincludeovervoltageandfoldback  
current protection. The DC/DC μModule® is offered in a  
small thermally enhanced 15mm × 15mm × 2.8mm LGA  
package. The LTM4609 is Pb-free and RoHS compliant.  
Telecom, Servers and Networking Equipment  
n
Industrial and Automotive Equipment  
n
High Power Battery-Operated Devices  
L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of  
Linear Technology Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Efficiency and Power Loss  
vs Input Voltage  
30V/2A Buck-Boost DC/DC μModule with 5V to 36V Input  
V
IN  
99  
98  
97  
96  
95  
94  
93  
92  
91  
6
5
4
3
2
1
0
CLOCK SYNC  
6.5V TO 36V  
10μF  
50V  
V
30V  
2A  
OUT  
V
IN  
PLLIN  
V
OUT  
+
10μF  
50V  
330μF  
50V  
FCB  
ON/OFF  
RUN  
LTM4609  
5.6μH  
SW1  
SW2  
R
SENSE  
+
SENSE  
R2  
0.1μF  
15mΩ  
s2  
–
SS  
SENSE  
EFFICIENCY  
POWER LOSS  
SGND  
V
FB  
PGND  
2.74k  
24  
(V)  
28  
36  
8
12  
16  
20  
V
32  
IN  
4609 TA01a  
4609 TA01b  
4609fa  
1
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