G5759

G5759
Global Mixed-mode Technology
400kHz 4A Synchronous Step-down DC/DC
Features
General Description
„
„
The G5759 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves 4A continuous output current over a wide input
supply range with excellent load and line regulation.
„
„
„
„
„
„
„
4A Output Current
Stable with Low ESR Output Ceramic Capacitors
Up to 90% Efficiency
25µA Shutdown Mode
Fixed 400kHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 7V to 18V Operating Input Range
Available in DIP-8 and 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
25µA 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
„
„
„
„
PC Monitors
DSL Modems
Distributed Power Systems
Pre-Regulator for Linear Regulators
The G5759 requires a minimum number of readily
available standard external components. It is available
in a DIP-8 and SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5759Z31U
G5759
-40°C to +85°C
DIP-8
G5759F11U
G5759
-40°C to +85°C
SOP-8 (FD)
Note: Z3: DIP-8
F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
Typical Application Circuit
G5759
VCC
1
8
GND
FB
2
7
LX
COMP
EN
3
6
4
5
IN
BS
C5
INPUT
12V
C1
10µF/35V
CERAMIC
OFF
ON
DIP-8
1
BS
2
IN
3
LX
4
Thermal
Pad
8
COMP
7
FB
6
GND
5
VCC
5/2
6/3
4/1
1/5
C2
0.1µF
G5759
EN
0.1µF
BS
IN
EN
LX
G5759
VCC
FB
7/4
2/7
COMP
GND
8/6,EP
C6
OPEN
3/8
C3
1.5nF
L1
15µH
R1
52.5kΩ
OUTPUT
5V/4A
1%
R2
10kΩ
1%
C2
22µF/35V
CERAMIC
R3
25kΩ
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.5
Apr 01, 2013
1