G5644 반도체 회로 부품 판매점
2.5A Buck Converter
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 Global Mixed-mode Technology |
Global Mixed-mode Technology Inc.
2.5A Buck Converter
G5644
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
0.8V 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
Applications
Distributed Power Systems
Battery Charger
Palmtop Computers, PDAs
DSL Modems
Pin Configuration
General Description
The G5644 is a high efficiency, 2.5A buck converter
with a high-side low RDS(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 0.8V. Whenever the load is light,
the G5644 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 G5644 is available in a SOP-8 package.
Ordering Information
ORDER
NUMBER
MARKING
G5644P11U
G5644
Note: P1: SOP-8
1: Bonding Code
U : Tape & Reel
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Pb free)
SOP-8
Typical Application Circuit
IN 1
EN 2
COMP 3
FB 4
G5644
SOP-8
8 NC
7 LX
6 GND
5 NC
V IN
5 V~18V
CC2
opt io nal
G5644
IN
10µ F
OFF ON
CC
1.5nF
RC
20kΩ
EN
COMP
GND
LX
FB
4. 7µ H
D1
SS34 R1/3kΩ
R2/ 12 kΩ
VOUT
1V / 2. 5A
47 µF
MLCC
V IN
5 V~18V
CC2
1 0p F
G5644
IN LX
10µ F
OFF ON EN
CC
47 0pF
COMP
GND
RC
60kΩ
FB
( )R1
V OUT = 0 .8 V x
1+
R2
4. 7µ H
D1
SS34 R1/3kΩ
R2/ 1 2kΩ
VOUT
1V / 2. 5A
0 .1 µF
100 µF/ 22 0µ F
Electr olytic
Ver: 0.1
Sep 05, 2008
TEL: 886-3-5788833
http://www.gmt.com.tw
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PDF 파일 내의 페이지 : 총 1 페이지
제조업체: Global Mixed-mode Technology
( gmmt )
G5644 converter
데이터시트 다운로드 :
[ G5644.PDF ]
[ G5644 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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