GMT G5754 2a step-down dc/dc Datasheet

Global Mixed-mode Technology Inc.
G5754/G5754A
2A Step-down DC/DC
Features
General Description
„
„
„
The G5754/G5754A is a monolithic step-down switch
mode regulator with a built in internal power MOSFET. It
achieves 2A continuous output current over a wide input
supply range with excellent load and line regulation.
„
„
„
„
„
„
„
„
„
2A Output Current
0.18Ω 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 4.75V to 24V Operating Input Range
Output Adjustable from 1.22V to 21.6V(G5754)
Output Adjustable from 0.92V to 21.6V(G5754A)
Available in SOP-8 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
30µA 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 G5754/G5754A requires a minimum number of
readily available standard external components. It is
available in a SOP-8 package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5754P11U
G5754
-40°C to +85°C
SOP-8
G5754AP11U
G5754A
-40°C to +85°C
SOP-8
Note: P1: SOP-8
1: Bonding Code
U : Tape & Reel
Pin Configuration
Typical Application Circuit
INPUT
12V
OFF
C5
10nF
C1
10µF
25V
3
8
ON
1
2
BS
IN
EN
LX
D1
G5754
SS / NC
FB
SS / NC
1
8
EN
BS
2
7
COMP
IN
3
6
FB
LX
4
5
GND
INPUT
12V
OFF
SOP-8
R2
10kΩ
1%
C3
4.7nF
C6
OPEN
R1
10.5kΩ
OUTPUT
2.5V/2A
1%
7
5
G5754/G5754A
6
COMP
GND
C4 10nF /
Open not used
L1
15µH
4
C2
22µF/6.3V
CERAMIC
R3
7.5kΩ
C5
10nF
C1
10µF
25V
ON
3
8
1
C4 10nF /
Open not used
2
BS
IN
EN
LX
D1
G5754A
SS / NC
FB
6
COMP
GND
7
5
C6
OPEN
L1
15µH
4
C3
4.7nF
R1
17.2kΩ
OUTPUT
2.5V/2A
1%
R2
10kΩ
1%
C2
22µF/6.3V
CERAMIC
R3
7.5kΩ
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.2
Jul 26, 2010
1
Similar pages