RT8011 Datasheet, PDF (1/17 Pages) Richtek Technology Corporation – 2A, 4MHz, Synchronous Step-Down Regulator

RT8011/A
2A, 4MHz, Synchronous Step-Down Regulator
General Description
The RT8011/A 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 2A of output current.
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. Switching frequency is set
by an external resistor or can be synchronized to an
external clock. 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.
RT8011/A operation in forced continuous PWM Mode which
minimizes ripple voltage and reduces the noise and RF
interference.
100% duty cycle in Low Dropout Operation further
maximize battery life.
Ordering Information
RT8011/A
Package Type
F : MSOP-10 (RT8011)
QW : WDFN-10L 3x3 (RT8011)
QW : WDFN-8E 3x3 (RT8011A)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Without SYNC and PGOOD Function
With SYNC and PGOOD Function
Note :
RichTek Pb-free and 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.
`100% matte tin (Sn) plating.
Features
z High Efficiency : Up to 95%
z Low R_DS(ON) Internal Switches : 110mΩ
z Programmable Frequency : 300kHz to 4MHz
z No Schottky Diode Required
z 0.8V Reference Allows Low Output Voltage
z Forced Continuous Mode Operation
z Low Dropout Operation : 100% Duty Cycle
z Synchronizable Switching Frequency (For RT8011
Only)
z Power Good Output Voltage Monitor (For RT8011
Only)
z RoHS Compliant and 100% Lead (Pb)-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)
SHDN/RT
SYNC
GND
LX
PGND
10
2
9
3
8
4
7
5
6
MSOP-10
COMP
FB
PGOOD
VDD
PVDD
SHDN/RT 1
SYNC 2
GND 3
LX 4
PGND 5
10 COMP
9 FB
8 PGOOD
7 VDD
PVDD
SHDN/RT 1
GND 2
LX 3
PGND 4
8 COMP
7 FB
6 VDD
5 PVDD
WDFN-10L 3x3
WDFN-8E 3x3
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
DS8011/A-00 August 2006
www.richtek.com
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