RT8089A Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – 3A, 1MHz, Synchronous Step-Down Converter

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RT8089A
3A, 1MHz, Synchronous Step-Down Converter
General Description
The RT8089A is a high efficiency synchronous, step-down
DC/DC converter. Its input voltage ranges from 2.7V to
5.5V that provides an adjustable regulated output voltage
from 0.6V to V_IN while delivering up to 3A of output current.
The internal synchronous low On-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The switching frequency is
fixed internally at 1MHz. The 100% duty cycle provides
low dropout operation, hence extending battery life in
portable systems. Current mode operation with internal
compensation allows the transient response to be
optimized over a wide range of loads and output capacitors.
The RT8089A is available in a WDFN-10L 3x3 package.
Ordering Information
RT8089A
Package Type
QW : WDFN-10L 3x3 (W-Type)
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.
Features
z High Efficiency : Up to 95%
z High Efficiency at Light Load
z Low R_DS(ON) Power Switches : 69mΩ/49mΩ
z Fixed Frequency : 1MHz
z No Schottky Diode Required
z Internal Compensation
z 0.6V Reference Allows Low Output Voltage
z Low Dropout Operation : 100% Duty Cycle
z OCP, UVP, OTP
z RoHS Compliant and Halogen Free
Applications
z Portable Instruments
z Battery Powered Equipment
z Notebook Computers
z Distributed Power Systems
z IP Phones
z Digital Cameras
Marking Information
2X= : Product Code
2X=YM
DNN
YMDNN : Date Code
Simplified Application Circuit
RT8089A
V_IN
VIN
SW
V_OUT
Chip Enable
VCC
EN
FB
PGOOD
GND
PGOOD
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8089A-01 March 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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