RT8279 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 5A, 36V, 500kHz Step-Down Converter

RT8279
5A, 36V, 500kHz Step-Down Converter
General Description
The RT8279 is a step-down regulator with an internal power
MOSFET. It achieves 5A of continuous output current over
a wide input supply range with excellent load and line
regulation. Current mode operation provides fast transient
response and eases loop stabilization.
For protection, the RT8279 provides cycle-by-cycle current
limiting and thermal shutdown protection. An adjustable
soft-start reduces the stress on the input source at
startup. In shutdown mode, the regulator draws only 25μA
of supply current.
The RT8279 requires a minimum number of readily
available external components, providing a compact
solution. The RT8279 is available in the SOP-8 (Exposed
Pad) package.
Ordering Information
RT8279
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
RT8279
GSPYMDNN
RT8279GSP : Product Number
YMDNN : Date Code
Features
z 5A Output Current
z Internal Soft-Start
z 110mΩ Internal Power MOSFET Switch
z Internal Compensation Minimizes External Parts
Count
z High Efficiency up to 90%
z 25μA Shutdown Mode
z Fixed 500kHz Frequency
z Thermal Shutdown
z Cycle-by-Cycle Over Current Protection
z Wide 5.5V to 36V Operating Input Range
z Adjustable Output Voltage from 1.222V to 26V
z Available In an SOP8 (Exposed Pad) Package
z RoHS Compliant and Halogen Free
Applications
z Distributive Power Systems
z Battery Charger
z DSL Modems
z Pre-regulator for Linear Regulators
Pin Configurations
(TOP VIEW)
BOOT
NC
NC
FB
8
2
7
GND
3
6
9
4
5
SW
VIN
GND
EN
SOP-8 (Exposed Pad)
DS8279-01 December 2011
www.richtek.com
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