GMT G5752 2a step-down dc/dc Datasheet

G5752/G5752A
Global Mixed-mode Technology
2A Step-down DC/DC
Features
General Description
„
„
„
The G5752/G5752A 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 4.5V to 24V Operating Input Range
Output Adjustable from 1.22V to 21.6V(G5752)
Output Adjustable from 0.92V to 21.6V(G5752A)
Available in SOP-8 & MSOP-10 (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
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 G5752/G5752A requires a minimum number of
readily available standard external components. It is
available in a SOP-8 & MSOP-10 (FD) package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5752P11U
G5752
-40°C to +85°C
SOP-8
G5752AP11U
G5752A
-40°C to +85°C
SOP-8
G5752F61U
G5752
-40°C to +85°C
MSOP-10 (FD)
G5752AF61U
G5752A
-40°C to +85°C
MSOP-10 (FD)
Note: P1: SOP-8 F6: MSOP-10 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
Typical Application Circuit
SOP-8 / MSOP-10 (FD) Pin No.
INPUT
4.5V to 24V
G5752/G5752A
OFF
BS
1
8
SS
IN
2
7
EN
LX
3
6
COMP
GND
4
5
FB
C1
10µF
35V
ON
C5
10nF
2/4
7/9
8/10
1/2
BS
IN
EN
LX
D1
G5752
SS
FB
5/7
6/8
4/6
OUTPUT
2.5V/2A
C2
22µF/35V
CERAMIC
R2
10kΩ
1%
C3
3.9nF
R3
10kΩ
C6
OPEN
R1
10.5kΩ
1%
COMP
GND
C4
10nF
L1
15µH
3/5
SOP-8
INPUT
4.5V to 24V
G5752/G5752A
NC
1
10
SS
BS
2
9
EN
NC
3
8
COMP
IN
4
7
FB
LX
Thermal
Pad
6
5
OFF
C5
10nF
C1
10µF
35V
ON
2/4
7/9
8/10
C4
10nF
1/2
BS
IN
EN
LX
FB
4/6
C6
OPEN
MSOP-10 (FD)
5/7
COMP
GND
GND
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
D1
G5752A
SS
L1
15µH
3/5
6/8
C3
3.9nF
R3
10kΩ
R1
26.1kΩ
OUTPUT
3.3V/2A
1%
R2
10kΩ
1%
C2
22µF/35V
CERAMIC
Note: Recommend choosing the small Vf of Diode to avoid LX to GND smaller then -0.7V.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.91
Jan 09, 2012
1
Similar pages