RT8253A Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – 3A, 23V, 340kHz Synchronous Step-Down Converter

RT8253A
3A, 23V, 340kHz Synchronous Step-Down Converter
General Description
Features
The RT8253A is a high efficiency, monolithic synchronous
step-down DC/DC converter that can deliver up to 3A
output current from a 4.5V to 23V input supply. The
RT8253A's current mode architecture and external
compensation allow the transient response to be
optimized over a wide range of loads and output capacitors.
Cycle by cycle current limit provides protection against
shorted outputs and soft-start eliminates input current
surge during start up. Fault conditions also include output
under voltage protection and thermal shutdown. The low
current (<3μA) shutdown mode provides output
disconnect, enabling easy power management in battery
powered systems. The RT8253A is available in a
SOP-8 (Exposed Pad) package.
z ±1.5% High Accuracy Feedback Voltage
z 4.5V to 23V Input Voltage Range
z 3A Output Current
z Integrated N-MOSFET Switches
z Current Mode Control
z Fixed Frequency Operation : 340kHz
z Output Adjustable from 0.8V to 20V
z Up to 95% Efficiency
z Programmable Soft-Start
z Stable with Low ESR Ceramic Output Capacitors
z Cycle by Cycle Over Current Protection
z Input Under Voltage Lockout
z Output Under Voltage Protection
z Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
Ordering Information
RT8253A
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Applications
z Industrial and Commercial Low Power Systems
z Set Top Box
Lead Plating System
z LCD Monitors and TVs
G : Green (Halogen Free and Pb Free) _{z Green Electronics/Appliances}
Note :
H : UVP Hiccup
L : UVP Latch-Off
z Point of Load Regulation of High Performance DSPs
z Wireless AP/Router
Richtek products are :
` RoHS compliant and compatible with the current require-
Pin Configurations
ments of IPC/JEDEC J-STD-020.
(TOP VIEW)
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
RT8253A
GSPYMDNN
RT8253AGSP : Product Number
YMDNN : Date Code
BOOT
VIN
SW
GND
8
2
7
GND
3
6
9
4
5
SS
EN
COMP
FB
SOP-8 (Exposed Pad)
DS8253A-02 March 2011
www.richtek.com
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