3A, 2MHz, Synchronous Step-Down Converter
The RT8015B is a high efficiency synchronous, step-down
DC/DC converter. Its input voltage range is from 2.6V to
5.5V and provides an adjustable regulated output voltage
from 0.8V 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 frequency is
set by an external resistor. The 100% duty cycle provides
low dropout operation extending battery life 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 RT8015B is operated in forced continuous PWM Mode
which minimizes ripple voltage and reduces the noise and
The 100% duty cycle in Low Dropout Operation further
maximize battery life.
The RT8015B is available in the WDFN-10L 3x3 package.
QW : WDFN-10L 3x3
Operating Temperature Range
G : Green (Halogen Free with Commer-
Richtek Green 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.
z High Efficiency : Up to 95%
z Low RDS(ON) Internal Switches : 110mΩ
z Programmable Frequency : 300kHz to 2MHz
z No Schottky Diode Required
z 0.8V Reference Allows for Low Output Voltage
z Forced Continuous Mode Operation
z Low Dropout Operation : 100% Duty Cycle
z Power Good Output Voltage Indicator
z RoHS Compliant and Halogen Free
z Portable Instruments
z Battery-Powered Equipment
z Notebook Computers
z Distributed Power Systems
z IP Phones
z Digital Cameras
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
DS8015B-01 September 2009