RT8030 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – 1A, 2.2MHz, Synchronous Step-Down Regulator

RT8030
1A, 2.2MHz, Synchronous Step-Down Regulator
General Description
The RT8030 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 output current up to 1A.
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.
RT8030 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.
Pin Configurations
(TOP VIEW)
SHDN/RT
GND
2
LX
3
PGND
4
8
COMP
7
FB
6
VDD
5
PVDD
SOP-8
Features
z High Efficiency : Up to 95%
z Low R_DS(ON) Internal Switches : 160mΩ
z Programmable Frequency : 300kHz to 2.5MHz
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 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
Ordering Information
RT8030
Package Type
S : SOP-8
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.
Typical Application Circuit
V_IN
2.6V to 5.5V
C_IN
10µF x 2
R_OSC
137k
RT8030
5 _PVDD
LX ³
L1
2.2µH
6 _VDD
4 _PGND
1 _SHDN/RT
FB ⁷
COMP ⁸
GND ²
R_COMP 13k
C_COMP
1nF
R1
210k
R2
240k
V_OUT
1.5V/1A
C_OUT
10µF x 2
Note : Using all Ceramic Capacitors
DS8030-02 March 2011
www.richtek.com
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