RT8082 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – 3A, 2MHz, Synchronous Step-Down Converter

®
RT8082
3A, 2MHz, Synchronous Step-Down Converter
General Description
The RT8082 is a high efficiency synchronous, step-down
DC/DC converter. Its input voltage range is from 2.7V to
5.5V and provides an adjustable regulated output voltage
from 1V to 5V 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 ripple voltage
is easily smoothed-out by small package filtering elements
due to a fixed operating frequency of 2MHz. The 100%
duty cycle provides low dropout operation extending
battery input range in portable systems. Current mode
operation with external compensation allows the transient
response to be optimized over a wide range of loads and
output capacitors.
The RT8082 operates in forced continuous PWM Mode,
which minimizes ripple voltage and reduces the noise and
RF interference.
Ordering Information
RT8082
Package Type
QW : WDFN-12E 3x3 (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.
Features
z High Efficiency : Up to 95%
z 2MHz Fixed Frequency PWM Operation
z No Schottky Diode Required
z 1V Reference Allows Low Output Voltage
z Output Current up to 3A
z Forced Continuous Mode Operation
z Low Dropout Operation : 100% Duty Cycle
z Enable Function
z Power Good Function
z Internal Soft-Start
z RoHS Compliant and Halogen Free
Applications
z LCD TV and Monitor
z Notebook Computers
z Distributed Power Systems
z IP Phones
z Digital Cameras
Marking Information
0E= : Product Code
0E=YM
DNN
YMDNN : Date Code
Simplified Application Circuit
V_IN
PGOOD
R_PGOOD
R_BIAS
C_BIAS
RT8082
VIN
LX
C_IN
BIAS
FB
PGOOD EN
PGND AGND
L
V_OUT
R1 ^CFF
R2
Enable
C_OUT
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8082-00 November 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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