G5684 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Step-Down DC/DC

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 V_IN
„ 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
C_C2
optional
G5684
IN
LX
10µF
OFF _ON
C_C
EN
COMP
GND
FB
FREQ
R_C
4.7µH
D1
R1
R2
NC
VOUT
3.3V/4A
22µF×2
MLCC
VIN
5V
C_C2
optional
G5684
IN
LX
10µF
OFF _ON
C_C
EN
COMP
GND
FB
FREQ
R_C
4.7µH
D1
R1
R2
NC
VOUT
3.3V/4A
0.1µF
470µF
Electrolytic
( ) ^R1
VOUT = 0.8V x 1 +
R2
Ver: 0.2
Dec 09, 2009
TEL: [phone]
http://www.gmt.com.tw
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