G5676 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 5A Synchronous Step-Down DC/DC

Global Mixed-mode Technology
G5676
5A Synchronous Step-Down DC/DC
Features
5A Output Current^*
75mΩ Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
or POSCAPs
Less Than 1µA Shutdown Current
1MHz Switching Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Output Adjustable from 0.6V to V_IN
Available in SOP-8 (FD) Package
*The output voltage should be less then 1.8V. If the Vout set-
ting is larger then 1.8V, the output current will be less then
5A because of thermal protection.
Applications
NB
Distributed Power Systems
Pre-Regulator for Linear Regulators
General Description
The G5676 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves a continuous output current at 1MHz switch-
ing frequency 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 ground
current is controlled less than 1µA. An Internal
soft-start minimizes the inrush supply current at initial
startup.
The G5676 requires a minimum number of readily
available standard external components. It is available
in SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
G5676F11U
Note: F1: SOP-8 (FD)
1 : Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
G5676
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
Typical Application Circuit
NC 1
LX 2
NC 3
G5676
GND
Thermal
Pad
8 PGND
7 PVIN
6 SVIN
EN 4
5 FB
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
VIN
10Ω
10µF
0.1µF
OFF _ON
G5676
PVIN
LX
SVIN
FB
EN
PGND GND
2.2µH
R1
40kΩ
R2
20kΩ
VOUT
1.8V/5A
22µFx2
Ver: 0.5
Aug 12, 2011
TEL: [phone]
http://www.gmt.com.tw
1