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G5755

更新时间： 2024-11-16 01:23:59
品牌 Logo 应用领域
致新 - GMT /
页数 文件大小 规格书
1页 84K
描述
3A, 1.5MHz, 28V Step-down DC/DC

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G5755 数据手册

  
G5755  
Global Mixed-mode Technology  
3A, 1.5MHz, 28V Step-down DC/DC  
Features  
General Description  
„
„
„
3A Output Current  
The G5755 is a monolithic step-down switch mode  
regulator with a built in internal power MOSFET. It  
achieves 3A continuous output current over a wide input  
supply range with excellent load and line regulation.  
Wide 4.5V to 28V Operating Input Range  
Programmable Switching Frequency from  
100kHz to 1.5MHz  
„
„
„
„
Internal Soft-Start  
Cycle-by-Cycle Over Current Protection  
Ceramic Capacitor Stable  
High-Efficiency Pulse Skipping Mode for Light  
Load  
The wide 4.5V to 28V input range accommodates a  
variety of step-down applications, including those in an  
automotive input environment. A 180µA operational  
quiescent current allows use in battery-powered applica-  
tions.  
„
Available in DIP-8, SOP-8 (FD) and TDFN3X3-8  
Package  
High power conversion efficiency over a wide load  
range is achieved by scaling down the switching fre-  
quency at light load condition to reduce the switching  
and gate driving losses.  
Applications  
„
„
„
„
„
High Voltage Power Conversion  
Automotive Systems  
Industrial Power Systems  
Distributed Power Systems  
Battery Powered Systems  
The frequency foldback helps prevent inductor current  
runaway during startup and thermal shutdown provides  
reliable, fault tolerant operation.  
Ordering Information  
By switching at 1.5MHz, the G5755 is able to prevent  
EMI (ELECTROMAGNETIC Interference) noise prob-  
lems, such as those found in AM radio and ADSL ap-  
plications.  
ORDER  
TEMP.  
PACKAGE  
(Green)  
DIP-8  
MARKING  
NUMBER  
G5755Z31U  
G5755F11U  
G5755RD1U  
RANGE  
G5755  
G5755  
5755  
-40°C to +85°C  
The G5755 requires a minimum number of readily  
available standard external components. It is available  
in a DIP-8, SOP-8 (FD) and TDFN3X3-8 package.  
-40°C to +85°C SOP-8 (FD)  
-40°C to +85°C TDFN3X3-8  
Note: Z3: DIP-8 F1: SOP-8 (FD) RD: TDFN3X3-8  
1: Bonding Code  
U : Tape & Reel  
Pin Configuration  
Typical Application Circuit  
G5755  
8
7
6
5
BS  
LX  
1
2
3
4
C4  
100nF  
IN  
EN  
INPUT  
C1  
R5  
7
8
10µF  
50V  
COMP  
FREQ  
GND  
L1  
10µH  
100k  
Ω
2
BS  
IN  
1
4
OUTPUT  
3.3V  
EN  
LX  
FB  
FB  
R1  
124kΩ  
R6  
24.9kΩ  
D1  
G5755  
6
DIP-8  
FREQ  
COMP  
GND  
5
R4  
200kΩ  
G5755  
G5755  
3
R2  
40.2 kΩ  
C2  
22µF  
6.3V  
C3  
220pF  
8
7
6
5
BS  
LX  
1
2
3
4
C6  
NS  
BS  
LX  
8
1
R3  
IN  
68.1kΩ  
EN  
IN  
7
6
EN  
COMP  
FB  
2
3
4
Thermal  
Pad  
Thermal  
Pad  
COMP  
FREQ  
GND  
FREQ  
GND  
5
FB  
SOP-8 (FD)  
TDFN3X3-8  
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.  
TEL: 886-3-5788833  
http://www.gmt.com.tw  
Ver: 0.8  
May 27, 2013  
1
1

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