G5753 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 3A Step-down DC/DC

Global Mixed-mode Technology
G5753/G5753A
3A Step-down DC/DC
Features
„ 3A Output Current
„ 0.15Ω 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(G5753)
„ Output Adjustable from 0.92V to 21.6V(G5753A)
„ Available in SOP-8 (FD), DIP-8 & MSOP-10 (FD)
Package
Applications
„ PC Monitors
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
General Description
The G5753/G5753A is a monolithic step-down switch
mode regulator with a built in internal power MOSFET. It
achieves 3A continuous output current over a wide input
supply range with excellent load and line regulation.
Current mode operation provides fast transient re-
sponse and eases 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
30µA of supply current. Programmable soft-start over-
writes the internal soft-start for various requirement of
output power up ramp and minimizes the inrush supply
current at initial startup.
The G5753/G5753A requires a minimum number of
readily available standard external components. It is
available in a SOP-8 (FD), DIP-8 & MSOP-10 (FD)
package.
Ordering Information
ORDER
NUMBER
MARKING
G5753F11U
G5753
G5753AF11U
G5753A
G5753Z31U
G5753
G5753AZ31U
G5753F61U
G5753A
G5753
G5753AF61U
G5753A
Note: F1: SOP-8 (FD) Z3: DIP-8
1: Bonding Code
U : Tape & Reel
Pin Configuration
F6: MSOP-10 (FD)
G5753/G5753A
BS 1
8 SS
IN 2
LX 3
Thermal
Pad
7 EN
6 COMP
GND 4
5 FB
SOP-8 (FD)/DIP-8
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
G5753/G5753A
NC 1
BS 2
NC 3
IN 4
Thermal
Pad
10 SS
9 EN
8 COMP
7 FB
LX 5
6 GND
MSOP-10 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
Ver: 0.8
Jan 09, 2012
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
SOP-8 (FD)
DIP-8
DIP-8
MSOP-10 (FD)
MSOP-10 (FD)
Typical Application Circuit
SOP-8 / MSOP-10 (FD) Pin No.
INPUT
4.5V to 24V
OFF ON
C1
10µF
35V
2/4
IN
7/9
EN
C5
10nF
1/2
BS
3/5
LX
8/10 _SS
G5753
FB ^5/7
C4
10nF
GND
4/6
COMP
6/8
C6
OPEN
C3
1nF
R3
6.2kΩ
L1
15µH
D1 ^R1
10.5kΩ
1%
R2
10kΩ
1%
OUTPUT
2.5V/3A
C2
22µF/35V
CERAMIC
INPUT
4.5V to 24V
OFF ON
C5
10nF
C1
10µF
35V
2/4
IN
7/9
EN
1/2
BS
3/5
LX
8/10
SS
G5753A
FB ^5/7
C4
10nF
GND
4/6
COMP
6/8
C6
OPEN
C3
1nF
R3
8.2kΩ
L1
15µH
D1 ^R1
3.3kΩ
1%
R2
10kΩ
1%
OUTPUT
1.2V/3A
C2
22µF/35V
CERAMIC
Note: Recommend choosing the small Vf of Diode to avoid LX to GND smaller then -0.7V.
TEL: [phone]
http://www.gmt.com.tw
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