G5655 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
G5655
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 0.92V to 12V
„ Available in SOP-8 and MSOP-10(FD) Package
Applications
„ PC Monitors
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
General Description
The G5655 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves 2A continuous output current over a wide in-
put supply range with excellent load and line regulation.
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 overwrites
the internal soft-start for various requirement of output
power up ramp and minimizes the inrush supply current
at initial startup.
The G5655 requires a minimum number of readily
available standard external components. It is available
in a SOP-8 and MSOP-10 (FD) package.
Ordering Information
ORDER
NUMBER
G5655P11U
G5655P12U
G5655F61U
Note: P1: SOP-8 F6: MSOP-10 (FD)
1 & 2: Bonding Code
U : Tape & Reel
MARKING
G5655
G5655A
G5655
Pin Configuration
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOP-8
SOP-8
MSOP-10 (FD)
Typical Application Circuit
G5655P11U
SS 1
8 EN
G5655P12U
NC 1
8 SS
NC 2
7 COMP IN 2
7 EN
IN 3
6 FB
LX 3
6 COMP
LX 4
5 GND GND 4
5 FB
SOP-8
SOP-8
G5655F61U
NC 1
NC 2
NC 3
IN 4
Thermal
Pad
10 SS
9 EN
8 COMP
7 FB
LX 5
6 GND
MSOP-10 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
VIN
4.75V~20V
C_C2
optional
G5655
IN
LX
10µF
OFF _ON ^EN
COMP
FB
C_C
GND ^SS
R_C
10µH
D1
SS34 R1/62kΩ
R2/24kΩ
0.1µF
VOUT
3.3V/2A
22µF
MLCC
VIN
4.75V~20V
C_C2
G5655
IN
LX
10µF
OFF _ON ^EN
COMP
FB
C_C
GND ^SS
R_C
10µH
D1
SS34 R1/62kΩ
R2/24kΩ
0.1µF
VOUT
3.3V/2A
0.1µF
100µF/220µF
Electrolytic
( ) ^R1
VOUT = 0.92V x 1+
R2
Ver: 0.8
Mar 25, 2011
TEL: [phone]
http://www.gmt.com.tw
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