RT8260A Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – 1.8A, 24V, 1.4MHz Step-Down Converter

RT8260A
1.8A, 24V, 1.4MHz Step-Down Converter
General Description
The RT8260A is a high voltage buck converter that can
support the input voltage range from 4.5V to 24V and the
output current can be up to 1.8A. Current Mode operation
provides fast transient response and eases loop
stabilization.
The chip also provides protection functions such as cycle-
by-cycle current limiting and thermal shutdown protection.
The RT8260A is available in a WDFN-8L 2x2 package.
Ordering Information
RT8260A
Package Type
QW : WDFN-8L 2x2 (W-Type)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
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
JGW
JG : Product Code
W : Date Code
Features
z Wide Operating Input Voltage Range : 4.5V to 24V
z Adjustable Output Voltage Range : 0.8V to 15V
z 1.8A Output Current
z 0.3Ω Internal Power MOSFET Switch
z High Efficiency up to 92%
z 1.4MHz Fixed Switching Frequency
z Stable with Low ESR Output Ceramic Capacitors
z Thermal Shutdown
z Cycle-By-Cycle Over Current Protection
z RoHS Compliant and Halogen Free
Applications
z Distributed Power Systems
z Battery Charger
z Pre-Regulator for Linear Regulators
z WLEDDrivers
Pin Configurations
(TOP VIEW)
NC 1
SW 2
VIN 3
EN 4
8 NC
7 BOOT
6 GND
9 _{5 FB}
WDFN-8L 2x2
Typical Application Circuit
V_IN
4.5V to 24V
C_IN
10µF
Chip Enable
3 _{VIN BOOT} 7
RT8260A
SW ²
4 _EN
FB ⁵
C_BOOT L1
10nF 4.7µH
D1
B230A
Open =
GND
Automatic Startup
6, 9 (Exposed Pad)
V_OUT
3.3V
R1
62k
R2
19.6k
C_OUT
22µF
DS8260A-03 March 2011
www.richtek.com
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