DC/DC Converter. GS5484 Datasheet

GS5484 Converter. Datasheet pdf. Equivalent

Part GS5484
Description 340KHz Synchronous Step-Down DC/DC Converter
Feature GS5484 24V, 3A, 340KHz Synchronous Step-Down DC/DC Converter Product Description The GS5484 is a sy.
Manufacture Globaltech
Datasheet
Download GS5484 Datasheet

GS5484 24V, 3A, 340KHz Synchronous Step-Down DC/DC Converter GS5484 Datasheet
GS5484H 40V,3A 350KHz Synchronous Step-Down DC/DC Converter GS5484H Datasheet
Recommendation Recommendation Datasheet GS5484 Datasheet





GS5484
GS5484
24V, 3A, 340KHz Synchronous Step-Down DC/DC Converter
Product Description
The GS5484 is a synchronous step-down
DC/DC converter that provides wide 4.5V to 24V
input voltage range and 3A continuous load
current capability.
Fault protection includes cycle-by-cycle current
limit, input UVLO, output over voltage protection
and thermal shutdown. Besides, adjustable
soft-start function prevents inrush current at
turn-on. This device uses current mode control
scheme that provides fast transient response. In
shutdown mode, the supply current is about
10uA.
The GS5484 is available in an 8-pin SOIC
package, provides a very compact system
solution and good thermal conductance.
Features
„ Wide Input Voltage from 4.5V to 24V
„ 3A Output Current
„ Adjustable Output Voltage from 0.925V to 20V
„ 150mintegrated Power MOSFET
„ High Efficiency Up to 92%
„ Fixed 340KHz Switching Frequency
„ Current Mode Operation
„ Adjustable Soft-Start
„ Cycle-by-Cycle current limit
„ Input Under Voltage Lockout
„ Over-Temperature Protection
„ 10uA Shutdown Current
„ Thermal Enhanced PSOP-8 Package
„ RoHS Compliant, 100%Pb & Halogen Free
Applications
„ Set-Top-Box
„ DVD, LCD Displays
„ OLPC, Netbook
„ Distributed Power System
„ Datacom, XDSL
Functional Block Diagram
www.gs-power.com 1



GS5484
Typical Applications
Table 1 recommended Component Selection
VOUT
5.0V
3.3V
2.5V
1.8V
1.2V
1.0V
R1
66K
25.9K
17K
9.4K
3.9K
1.3K
R2
15K
10K
10K
10K
10K
15K
R3
12K
7.5K
6.8K
5.6K
3.9K
3.3K
C3
3.3nF
3.3nF
3.3nF
3.3nF
3.3nF
3.3nF
L1
10μH
10μH
6.8μH
6.8μH
4.7μH
3.3μH
C2
22μFx2
22μFx2
22μFx2
22μFx2
22μFx2
22μFx2
Packages & Pin Assignments
GS5484PSF (PSOP-8)
Name No.
Description
BS
1
High Side Gate Drive Boost Input. A 10nF or greater capacitor must be connected from
this pin to SW. It can boost the gate drive to fully turn on the internal high side NMOS.
VIN
2
Power Supply Input Pin. Drive 4.5V to 24V voltage to this pin to power on this chip.
Connecting a 10uF ceramic bypass capacitor between VIN and GND to eliminate noise.
SW
3
Power Switching Output. It is the output pin that internal high side NMOS switching to
supply power.
GND
4 Ground Pin. Connecting this pin to exposed pad.
FB
5
Voltage Feedback Input Pin. Connecting FB and VOUT with a resistive voltage divider.
This IC senses feedback voltage via FB and regulate it at 0.925V.
COMP
6
Compensation Pin. This pin is used to compensate the regulation control loop. Connect
a series RC network from COMP pin to GND.
EN
7
Enable Input Pin. This pin provides a digital control to turn the converter on or off.
Connect to VIN with a 100Kresistor for self-startup.
SS
8
Soft-Start Input Pin. This pin controls the soft-start period. Connect a capacitor from SS
to GND to set the soft start period.
www.gs-power.com 2





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)