G5764 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 3A Step-down DC/DC

Global Mixed-mode Technology
3A Step-down DC/DC
G5764
Features
„ 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
Applications
„ PC Monitors
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
General Description
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.
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
30µA 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 G5764 requires a minimum number of readily
available standard external components. It is available
in a SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
G5764F11U
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
G5764
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
Typical Application Circuit
G5764
BS 1
8 SS
IN 2
LX 3
Thermal
Pad
7 EN
6 COMP
GND 4
5 FB
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
INPUT
12V
OFF ON
C1
10µF
35V
C4
10nF
C5
10nF
2
7
IN
EN
1
BS
3
LX
8 _SS
G5764
FB ⁵
GND
4
COMP
6
C6
OPEN
C3
1nF
R3
15kΩ
L1
15µH
D1 ^R1
10.5kΩ
1%
R2
10kΩ
1%
OUTPUT
2.5V/3A
C2
22µF/35V
CERAMIC
Ver: 0.1
Aug 29, 2012
TEL: [phone]
http://www.gmt.com.tw
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