GMT G5655 2a step-down dc/dc Datasheet

G5655
Global Mixed-mode Technology Inc.
2A Step-down DC/DC
Features
General Description
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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 input supply range with excellent load and line regulation.
2A Output Current
0.18Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
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
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Current mode operation provides fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current 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.
Applications
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The G5655 requires a minimum number of readily
available standard external components. It is available
in a SOP-8 and MSOP-10 (FD) package.
PC Monitors
DSL Modems
Distributed Power Systems
Pre-Regulator for Linear Regulators
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5655P11U
G5655
-40°C to +85°C
SOP-8
G5655P12U
G5655F61U
G5655A
G5655
-40°C to +85°C
-40°C to +85°C
SOP-8
MSOP-10 (FD)
Note: P1: SOP-8 F6: MSOP-10 (FD)
1 & 2: Bonding Code
U : Tape & Reel
Pin Configuration
Typical Application Circuit
G5655
SS
VIN
4.75V~20V
G5655P12U
G5655P11U
8
1
NC
EN
8
1
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
CC2
optional
10µF
OFF ON EN
COMP
CC
GND
D1
SS34 R1/62kΩ
FB
SS
0.1µF
RC
VOUT
3.3V/2A
22µF
MLCC
R2/24kΩ
SOP-8
G5655F61U
NC
10µH
LX
IN
1
NC
2
NC
3
IN
LX
10
Thermal
Pad
9
EN
8
COMP
4
7
FB
5
6
GND
G5655
VIN
4.75V~20V
SS
CC2
IN
10µF
OFF ON EN
COMP
CC
GND
10µH
LX
D1
SS34 R1/62kΩ
FB
SS
R2/24kΩ
VOUT
3.3V/2A
0.1µF
100µF/220µF
Electrolytic
0.1µF
RC
MSOP-10 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
VOUT = 0.92V x (1+
R1
R2
)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.8
Mar 25, 2011
1
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