G5764

G5764
Global Mixed-mode Technology
3A Step-down DC/DC
Features
General Description
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The G5764 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves 3A continuous output current over a wide input
supply range with excellent load and line regulation.
3A Output Current
0.15Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
Up to 95% Efficiency
30µA Shutdown Mode
Fixed 380kHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.5V to 28V Operating Input Range
Output Adjustable from 1.22V to 21.6V
Available in SOP-8 (FD) Package
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
30µA 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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PC Monitors
DSL Modems
Distributed Power Systems
Pre-Regulator for Linear Regulators
The G5764 requires a minimum number of readily
available standard external components. It is available
in a SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5764F11U
G5764
-40°C to +85°C
SOP-8 (FD)
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
Typical Application Circuit
INPUT
12V
G5764
BS
IN
2
LX
3
GND
8
1
Thermal
Pad
4
SS
7
EN
6
COMP
5
OFF
C5
10nF
C1
10µF
35V
ON
2
7
8
C4
10nF
FB
SOP-8 (FD)
1
BS
IN
EN
LX
FB
5
COMP
GND
4
6
C6
OPEN
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
D1
G5764
SS
L1
15µH
3
C3
1nF
R3
15kΩ
R1
10.5kΩ
OUTPUT
2.5V/3A
1%
R2
10kΩ
1%
C2
22µF/35V
CERAMIC
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.1
Aug 29, 2012
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