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G5796

更新时间： 2024-11-16 01:21:47
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描述
500kHz 2A/3A Synchronous Step-down DC/DC

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G5796 数据手册

  
Global Mixed-mode Technology Inc.  
G5754/G5754A  
2A Step-down DC/DC  
Features  
General Description  
„
„
„
2A Output Current  
The G5754/G5754A is a monolithic step-down switch  
mode regulator with a built in internal power MOSFET. It  
achieves 2A continuous output current over a wide input  
supply range with excellent load and line regulation.  
0.18Ω Internal Power MOSFET Switch  
Stable with Low ESR Output Ceramic Capaci-  
tors  
„
„
„
„
„
„
„
„
„
Up to 95% Efficiency  
30µA Shutdown Mode  
Fixed 380kHz Frequency  
Thermal Shutdown  
Current mode operation provides fast transient re-  
sponse and eases loop stabilization.  
Fault condition protection includes cycle-by-cycle cur-  
rent limiting, output short circuit protection and thermal  
shutdown. In shutdown mode the regulator draws  
30µA of supply current. Programmable soft-start over-  
writes the internal soft-start for various requirement of  
output power up ramp and minimizes the inrush supply  
current at initial startup.  
Cycle-by-Cycle Over Current Protection  
Wide 4.75V to 24V Operating Input Range  
Output Adjustable from 1.22V to 21.6V(G5754)  
Output Adjustable from 0.92V to 21.6V(G5754A)  
Available in SOP-8 Package  
Applications  
„
„
„
„
PC Monitors  
DSL Modems  
The G5754/G5754A requires a minimum number of  
readily available standard external components. It is  
available in a SOP-8 package.  
Distributed Power Systems  
Pre-Regulator for Linear Regulators  
Ordering Information  
ORDER  
NUMBER  
G5754P11U  
TEMP.  
RANGE  
PACKAGE  
(Green)  
SOP-8  
MARKING  
G5754  
-40°C to +85°C  
G5754AP11U  
G5754A  
-40°C to +85°C  
SOP-8  
Note: P1: SOP-8  
1: Bonding Code  
U : Tape & Reel  
Pin Configuration  
Typical Application Circuit  
C5  
10nF  
INPUT  
12V  
C1  
3
2
10µF  
25V  
L1  
15µH  
BS  
IN  
8
1
4
6
OUTPUT  
2.5V/2A  
EN  
LX  
OFF  
ON  
R1  
10.5kΩ  
D1  
G5754  
SS / NC  
FB  
COMP  
1%  
GND  
5
C4 10nF  
/
7
Open not used  
C2  
R2  
10kΩ  
1%  
C3  
22µF/6.3V  
CERAMIC  
4.7nF  
G5754/G5754A  
C6  
R3  
OPEN  
7.5kΩ  
1
2
3
4
8
7
6
5
EN  
SS / NC  
BS  
COMP  
FB  
C5  
10nF  
IN  
INPUT  
12V  
C1  
10µF  
25V  
3
2
LX  
GND  
L1  
15µH  
BS  
LX  
IN  
8
1
4
OUTPUT  
2.5V/2A  
EN  
OFF  
ON  
SOP-8  
R1  
D1  
G5754A  
17.2kΩ  
6
SS / NC  
FB  
1%  
COMP  
7
GND  
5
C4 10nF  
Open not used  
/
C2  
22µF/6.3V  
CERAMIC  
R2  
C3  
4.7nF  
10kΩ  
1%  
C6  
R3  
OPEN  
7.5kΩ  
TEL: 886-3-5788833  
http://www.gmt.com.tw  
Ver: 0.2  
Jul 26, 2010  
1
1

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