G5654 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 2A Step-down DC/DC

Global Mixed-mode Technology Inc.
2A Step-down DC/DC
G5654
Features
„ 2A Output Current
„ 0.18Ω Internal Power MOSFET Switch
„ Stable with Low ESR Output Ceramic Capaci-
tors
„ Up to 95% Efficiency
„ 25µA Shutdown Mode
„ Fixed 380kHz Frequency
„ Thermal Shutdown
„ Cycle-by-Cycle Over Current Protection
„ Wide 4.75V to 20V Operating Input Range
„ Output Adjustable from 1.22V to 12V
„ Available in SOP-8 Package
Applications
„ PC Monitors
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
Pin Configuration
General Description
The G5654 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 regula-
tion.
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
25µA 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.
The G5654 requires a minimum number of readily
available standard external components. It is available
in a SOP-8 package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5654P11U G5654 -40°C to +85°C SOP-8
G5654P12U G5654A -40°C to +85°C SOP-8
Note: P1: SOP-8
1: Bonding Code
U : Tape & Reel
Typical Application Circuit
G5654P11U
NC 1
8 SS
IN 2
7 EN
LX 3
6 COMP
GND 4
5 FB
SOP-8
G5654P12U
SS 1
8 EN
NC 2
7 COMP
IN 3
6 FB
LX 4
5 GND
SOP-8
VIN
4.75V~20V
C_C2
optional
G5654
IN
LX
10µF
OFF _ON ^EN
COMP
FB
C_C
GND ^SS
R_C
10µH
D1
SS34 R1/28kΩ
R2/16kΩ
0.1µF
VOUT
3.3V/2A
22µF
MLCC
VIN
4.75V~20V
C_C2
G5654
IN
LX
10µF
OFF _ON ^EN
COMP
FB
C_C
GND ^SS
R_C
10µH
D1
SS34 R1/28kΩ
R2/16kΩ
0.1µF
VOUT
3.3V/2A
0.1µF
100µF/220µF
Electrolytic
( ) ^R1
VOUT = 1.22V x 1 +
R2
Ver: 0.5
Aug 03, 2009
TEL: [phone]
http://www.gmt.com.tw
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