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G5640 参数 Datasheet PDF下载

G5640图片预览
型号: G5640
PDF下载: 下载PDF文件 查看货源
内容描述: 2.5A降压转换器 [2.5A Buck Converter]
分类和应用: 转换器
文件页数/大小: 1 页 / 637 K
品牌: GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
   
Global Mixed-mode Technology Inc.
G5640
2.5A Buck Converter
Features
4.75V to 20V Supply Voltage Operating Range
Fixed 500kHz Switching Frequency
Current-Mode Buck PWM Converter
Built-in P-Channel Power MOSFET
2.5A Output Current
1.2V Internal Reference
Shutdown Control
Thermal-Shutdown and Internal Soft Start
Cycle-by-Cycle Current-Limit
Short Circuit Protection
Under-Voltage Lockout Protection
SOP-8 Package
General Description
The G5640 is a high efficiency, 2.5A buck converter
with a high-side low R
DS(ON)
switch. It operates from
4.75V to 20V input voltage range, and provides up to
2.5A continuous output current with the output voltage
adjustable down to 1.2V. Whenever the load is light,
the G5640 automatically change the PWM operation
mode to PFM operation to minimize the power con-
sumption. Hence it is suitable for battery-powered de-
vices.
It uses a fixed switching frequency up to 500kHz.
When a short circuit is detected on the output, the de-
vice change switching frequency to 50kHz to protect
IC from damage.
The G5640 is available in a SOP-8 package.
Applications
Distributed Power Systems
Battery Charger
Palmtop Computers, PDAs
DSL Modems
Ordering Information
ORDER
NUMBER
G5640P11U
Note: P1: SOP-8
1: Bonding Code
U : Tape & Reel
MARKING
G5640
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
SOP-8
Pin Configuration
Typical Application Circuit
V
IN
5V~18V
G5640
IN
10µF
OFF ON EN
COMP
GND
C
C
R
C
LX
D1
SS34
L
V
OUT
C
OUT
MLCC
R1
FB
R2
G5640
IN
EN
COMP
FB
1
2
3
4
8
7
6
5
NC
LX
GND
NC
C
C2
optional
V
IN
5V~18V
G5640
IN
10µF
OFF ON EN
COMP
C
C
GND
R
C
LX
D1
SS34
L
V
OUT
R1
0.1µF
C
OUT
Electrolytic
FB
R2
SOP-8
C
C2
optional
V
OUT
= 1.2V x
(
1 +
R1
R2
)
* Refer to Table 1 & Table 2 for Component Selection
Ver: 0.8
May 25, 2010
TEL: 886-3-5788833
http://www.gmt.com.tw
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