G5759 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – 400kHz 4A Synchronous Step-down DC/DC

Global Mixed-mode Technology
G5759
400kHz 4A Synchronous Step-down DC/DC
Features
„ 4A Output Current
„ Stable with Low ESR Output Ceramic Capaci-
tors
„ 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
Applications
„ PC Monitors
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
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.
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
25µA 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 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
G5759Z31U
G5759F11U
Note: Z3: DIP-8 F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
MARKING
G5759
G5759
Pin Configuration
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
DIP-8
SOP-8 (FD)
Typical Application Circuit
VCC 1
G5759
8 GND
FB 2
7 LX
COMP 3
6 IN
EN 4
EN 1
BS 2
IN 3
LX 4
DIP-8
G5759
Thermal
Pad
5 BS
8 COMP
7 FB
6 GND
5 VCC
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
Ver: 0.5
Apr 01, 2013
INPUT
12V
C1
10µF/35V
CERAMIC
OFF ON
C2
0.1µF
C5
0.1µF
6/3
4/1
IN
EN
5/2
BS
7/4
LX
1/5
G5759
VCC
FB ^2/7
GND
8/6,EP
C6
OPEN
COMP
3/8
C3
1.5nF
R3
25kΩ
L1
15µH
R1
52.5kΩ
1%
R2
10kΩ
1%
OUTPUT
5V/4A
C2
22µF/35V
CERAMIC
TEL: [phone]
http://www.gmt.com.tw
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