G5756 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 1.5A, 1.4MHz Step-down DC/DC

Global Mixed-mode Technology
G5756
1.5A, 1.4MHz Step-down DC/DC
Features
„ 1.5A Output Current
„ 0.15Ω Internal Power MOSFET Switch
„ Stable with Low ESR Output Ceramic Capaci-
tors
„ 30µA Shutdown Mode
„ Fixed 1.4MHz Frequency
„ Thermal Shutdown
„ Cycle-by-Cycle Over Current Protection
„ Wide 4.5V to 24V Operating Input Range
„ Output Adjustable from 0.92V to 16V
„ Available in SOP-8 (FD) Package
Applications
„ PC Monitors
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
General Description
The G5756 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves 1.5A continuous output current over a wide
input supply range with excellent load and line regula-
tion.
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 G5756 requires a minimum number of readily
available standard external components. It is available
in a SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
G5756F11U
Note: F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
MARKING
G5756
TEMP.
RANGE
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
Typical Application Circuit
G5756
BS 1
8 SS
IN 2
LX 3
Thermal
Pad
7 EN
6 COMP
GND 4
5 FB
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
INPUT
4.5V to 24V
C1
10µF/35V
CERAMIC
OPEN = AUTOMATIC
STARTUP
C4
0.1µF
C5
10nF
2
7
IN
EN
1
BS
3
LX
8
SS
G5756
FB ⁵
GND
4
COMP
6
C6
OPEN
C3
1nF
R3
20kΩ
L1
4.7µH
D1
R1
25.5kΩ
R2
10kΩ
OUTPUT
3.3V/1.5A
C2
22µF/6.3V
CERAMIC
Ver: 0.5
Mar 28, 2012
TEL: [phone]
http://www.gmt.com.tw
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