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參數資料
| 型號： | 1002AS |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | Dual 1.2MHz, 800mA Synchronous Step-Down Converter |
| 中文描述： | 雙1.2MHz的，800mA的同步降壓轉換器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 303K |
| 代理商： | 1002AS |
The Future of Analog IC Technology
MP2109
Dual 1.2MHz, 800mA Synchronous
Step-Down Converter
MP2109 Rev.1.3
2/21/2006
www.MonolithicPower.com
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
TM
DESCRIPTION
The MP2109 contains two independent 1.2MHz
constant frequency, current mode, PWM
step-down
converters.
integrates a main switch and a synchronous
rectifier for high efficiency without an external
Schottky diode. The MP2109 is ideal for
powering portable equipment that runs from a
single cell Lithium-Ion (Li+) battery. Each
converter can supply 800mA of load current
from a 2.5V to 6V input voltage. The output
voltage can be regulated as low as 0.6V. The
MP2109 can also run at 100% duty cycle for
low dropout applications.
Each
converter
EVALUATION BOARD REFERENCE
Board Number
EV2109DQ-00A
Dimensions
1.5”X x 1.0”Y x 0.5”Z
FEATURES
Up to 95% Efficiency
1.2MHz Constant Switching Frequency
800mA Load Current on Each Channel
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Current Mode Control
Short Circuit Protection
Thermal Fault Protection
<0.1μA Shutdown Current
Internally Compensated
Space Saving 10-Pin QFN Package
APPLICATIONS
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP2109
IN2
IN1
3
8
4
9
GND2
GND1
FB2
SW2
EN2
7
5
6
2
10
1
FB1
SW1
EN1
V
IN1/IN2
2.5V to 6V
OFF ON
OFF ON
V
OUT2
1.2V
800mA
V
OUT1
1.8V
800mA
MP2109_S01
100
95
90
85
80
75
70
65
60
55
50
E
%
)
0
500
1000
LOAD CURRENT (mA)
MP2109_EC01
V
OUT
=3.3V
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