RT8026 Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – 1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter

RT8026
1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC
Converter
General Description
The RT8026 is a high-efficiency Pulse-Width-Modulated
(PWM) step-down DC/DC converter. Capable of delivering
1A output current over a wide input voltage range from
2.7V to 5.5V, the RT8026 is ideally suited for portable
electronic devices that are powered from 1-cell Li-ion
battery or from other power sources such as cellular
phones, PDAs and hand-held devices.
Two operating modes are available including : PWM/Low-
Dropout autoswitch and shut-down modes. The Internal
synchronous rectifier with low R_DS(ON) dramatically reduces
conduction loss at PWM mode. No external Schottky
diode is required in practical application.
The RT8026 enters Low-Dropout mode when normal PWM
cannot provide regulated output voltage by continuously
turning on the upper P-MOSFET. The RT8026 enter shut-
down mode and consumes less than 0.1μA when the EN
pin is pulled low.
The switching ripple is easily smoothed-out by small
package filtering elements due to a fixed operating
frequency of 1.5MHz. This along with small MSOP-10
package provides small PCB area application. Other
features include soft start, lower internal reference voltage
with 2% accuracy, over temperature protection, and over
current protection.
Ordering Information
RT8026
Package Type
F : MSOP-10
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.
Features
z Input Voltage Range : 2.7V to 5.5V
z Adjustable Output Voltage : 1V to V_IN
z Output Current : 1A
z High Efficiency : up to 95%
z No Schottky Diode Required
z 1.5MHz Fixed Frequency PWM Operation
z Current Limiting Protection
z Thermal Shutdown Protection
z Small MSOP-10 Package
z RoHS Compliant and Halogen Free
Applications
z Mobile Phones
z Personal Information Appliances
z Wireless and DSL Modems
z MP3 Players
z Portable Instruments
Pin Configurations
(TOP VIEW)
VIN
NC
GND
NC
FB
10
2
9
3
8
4
7
5
6
MSOP-10
PGND
LX
EN
NC
NC
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS8026-02 March 2011
www.richtek.com
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