RT8075 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – Dual 1A, 1.25MHz Synchronous Step-Down Converter

RT8075
Dual 1A, 1.25MHz Synchronous Step-Down Converter
General Description
The RT8075 is a high efficiency Pulse-Width-Modulated
(PWM) dual step-down DC/DC converter. Capable of
delivering up to 1A output current over a wide input voltage
range from 2.5V to 5.5V, the RT8075 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, PC WLAN card and hand-held devices.
Three operating modes are available including : PWM
mode, Low Dropout Mode and shut-down mode. 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
RT8075 enters Low Dropout mode when normal PWM
cannot provide regulated output voltage by continuously
turning on the upper P-MOSFET. The RT8075 enters 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 the fixed operating
frequency of 1.25MHz. The RT8075 is available in the
WDFN-10L 3x3 package.
Pin Configurations
(TOP VIEW)
EN1 1
FB1 2
VIN2 3
GND 4
LX2 5
10 LX1
9 GND
8 _VIN1
7 FB2
11
EN2
WDFN-10L 3x3
Marking Information
RT8075GQW
38=YM
DNN
38= : Product Code
YMDNN : Date Code
Features
z 2.5V to 5.5V Input Range
z 1A Output Current
z 1.25MHz Fixed Frequency PWM Operation
z 95% Efficiency
z No Schottky Diode Required
z 0.6V Reference Allows Low Output Voltage
z Low Dropout Operation : 100% Duty Cycle
z Small 10-Lead WDFN Package
z RoHS Compliant and Halogen Free
Applications
z Portable Instruments
z Microprocessors and DSP Core Supplies
z Cellular Phones
z Wireless and DSL Modems
z PC Cards
Ordering Information
RT8075
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
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.
RT8075ZQW
38 YM
DNN
38 : Product Code
YMDNN : Date Code
DS8075-04 April 2011
www.richtek.com
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