General Description
The RT6283B is a high efficiency, current mode
synchronous step-down DC-DC converter that can deliver
up to 3A output current over a wide input voltage range
from 4.5V to 30V. The device integrates a 150mΩ high
side and a 80mΩ low side MOSFET to achieve high
conversion efficiency up to 95%. The current mode control
architecture supports fast transient response and simple
compensation circuit.
A cycle-by-cycle current limit function provides protection
against shorted output and an internal soft-start eliminates
input current surge during start-up. The RT6283B provides
complete protection functions such as input under-voltage
lockout, output under-voltage protection, over-current
protection and thermal shutdown.
The RT6283B is available in the thermal enhanced SOP-8
(Exposed Pad) package.

Features
 4.5V to 30V Input Voltage Range
 3A Output Current
 Internal N-MOSFETs
 Current Mode Control
 Fixed Frequency Operation : 500kHz
 Adjustable Output Voltage from 0.8V to 24V
 High Efficiency Up to 95%
 Stable with Low ESR Ceramic Output Capacitors
 Cycle-by-Cycle Current Limit
 Input Under-Voltage Lockout
 Output Under-Voltage Protection
 Thermal Shutdown Protection
 Adjustable Current Limit
 Power Saving Mode for High Efficiency at Light
Load
 RoHS Compliant and Halogen Free

Applications
 Distributed Power Systems
 Pre-Regulator for Linear Regulators
 Notebook Computers
 Point of Load Regulator in Distributed Power System
 Digital Set-top Boxes
 Personal Digital Recorders
 Broadband Communications
 Flat Panel TVs and Monitors
 Vehicle Electronics