RT8015B Datasheet, PDF (1/16 Pages) Richtek Technology Corporation – 3A, 2MHz, Synchronous Step-Down Converter

RT8015B
3A, 2MHz, Synchronous Step-Down Converter
General Description
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
RF interference.
The 100% duty cycle in Low Dropout Operation further
maximize battery life.
The RT8015B is available in the WDFN-10L 3x3 and SOP-
8 (Exposed Pad) packages.
Features
z High Efficiency : Up to 95%
z Low R_DS(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
Applications
z Portable Instruments
z Battery-Powered Equipment
z Notebook Computers
z Distributed Power Systems
z IP Phones
z Digital Cameras
Pin Configurations
(TOP VIEW)
Ordering Information
RT8015B
Package Type
QW : WDFN-10L 3x3
SP : SOP-8 (Exposed Pad-Option 2)
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.
SHDN/RT 1
GND 2
LX 3
LX ⁴
PGND 5
10 COMP
9 FB
8 PGOOD
7 VDD
11
PVDD
WDFN-10L 3x3
SHDN/RT
GND
LX
PGND
8
2
7
GND
3
6
4
9
5
COMP
FB
VDD
PVDD
SOP-8 (Exposed Pad)
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS8015B-04 March 2011
www.richtek.com
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