RT8010/A
1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter
General Description
The RT8010/A 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
2.5V to 5.5V, the RT8010/A 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 RT8010/A enters Low-Dropout mode when normal
PWM cannot provide regulated output voltage by
continuously turning on the upper PMOS. RT8010/A enter
shut-down mode and consumes less than 0.1μA when
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 WDFN-6L 2x2
and WQFN-16L 3x3 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.
Features
+2.5V to +5.5V Input Range
Output Voltage (Adjustable Output From 0.6V to V
IN
)
RT8010 : 1.0V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V
Fixed/Adjustable Output Voltage
RT8010A Adjustable Output Voltage Only
1A Output Current
95% Efficiency
No Schottky Diode Required
1.5MHz Fixed-Frequency PWM Operation
Small 6-Lead WDFN and 16-Lead WQFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Mobile Phones
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
Portable Instruments
Ordering Information
RT8010/A(-
)
Package Type
QW : WDFN/WQFN (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
Default : Adjustable (RT8010/A)
Fixed (RT8010)
10 : 1.0V
12 : 1.2V
15 : 1.5V
16 : 1.6V
18 : 1.8V
25 : 2.5V
33 : 3.3V
WQFN-16L 3x3
WDFN-6L 2x2
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.
www.richtek.com
1
Pin Configurations
(TOP VIEW)
NC
LX
LX
LX
16 15 14 13
WDFN-6L 2x2 (RT8010)
WQFN-16L 3x3 (RT8010A)
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.
DS8010/A-02 March 2007
GND
NC
EN
NC
NC
EN
VIN
1
2
3
6
5
4
FB/VOUT
GND
LX
GND
GND
GND
FB/VOUT
1
2
3
4
5
6
7
8
12
11
VIN
VIN
10
VIN
9
VIN
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
