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G5684 Schematic ( PDF Datasheet ) - Global Mixed-mode Technology

Teilenummer G5684
Beschreibung Step-Down DC/DC
Hersteller Global Mixed-mode Technology
Logo Global Mixed-mode Technology Logo 




Gesamt 1 Seiten
G5684 Datasheet, Funktion
Global Mixed-mode Technology Inc.
Step-Down DC/DC
G5684
Features
„ 4A Output Current
„ 75mΩ Internal Power MOSFET Switch
„ Stable with Low ESR Output Ceramic Capaci-
tors
„ Up to 95% Efficiency
„ Less Than 1µA Shutdown Current
„ Wide Switching Frequency Range from
300kHz~1.4MHz
„ Thermal Shutdown
„ Cycle-by-Cycle Over Current Protection
„ Output Adjustable from 0.8V to VIN
„ Available in SOP-8 (FD) Package
Applications
„ TV
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
General Description
The G5684 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves 4A continuous output current over a wide
switching frequency range with excellent load and line
regulation.
Current mode operation provides fast transient re-
sponse and eases of 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 less
than 1µA of supply current. Internal soft-start minimizes
the inrush supply current at initial startup.
The G5684 requires a minimum number of readily
available standard external components. It is available
in SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
G5684F11U
Note: F1: SOP-8 (FD)
1 : Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
G5684
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
Typical Application Circuit
COMP 1
G5684
8 FB
GND 2
EN 3
Thermal
Pad
7 FREQ
6 LX*
IN 4
5 LX
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
*Pin#6 should be considered as LX when circuit
design and PCB layout, but it is NC pin actually.
VIN
5V
CC2
optional
G5684
IN LX
10µF
OFF ON
CC
EN
COMP
GND
FB
FREQ
RC
4.7µH
D1 R1
R2
NC
VOUT
3.3V/4A
22µF×2
MLCC
VIN
5V
CC2
optional
G5684
IN LX
10µF
OFF ON
CC
EN
COMP
GND
FB
FREQ
RC
4.7µH
D1
R1
R2
NC
VOUT
3.3V/4A
0.1µF
470µF
Electrolytic
( )VOUT = 0.8V x
1 + R1
R2
Ver: 0.2
Dec 09, 2009
TEL: 886-3-5788833
http://www.gmt.com.tw
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