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參數(shù)資料
| 型號： | CR43-4R7 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 1MHz, 800mA Synchronous Step-Down Converter |
| 中文描述： | 1MHz的，800mA的同步降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 290K |
| 代理商： | CR43-4R7 |
The Future of Analog IC Technology
MP2105
1MHz, 800mA Synchronous
Step-Down Converter
MP2105 Rev. 1.3
5/11/2006
www.MonolithicPower.com
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
TM
DESCRIPTION
The MP2105 is a 1MHz constant frequency,
current mode, PWM step-down converter. The
device integrates a main switch and a
synchronous rectifier for high efficiency without
an external Schottky diode. It is ideal for
powering portable equipment that runs from a
single cell Lithium-Ion (Li+) battery. The
MP2105 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 MP2105
can also run at 100% duty cycle for low dropout
applications.
The MP2105 is available in a low profile (1mm)
5-pin, TSOT package.
EVALUATION BOARD REFERENCE
Board Number
EV2105DJ-00A
Dimensions
2.0”X x 2.0”Y x 0.5”Z
FEATURES
High Efficiency: Up to 95%
1MHz Constant Switching Frequency
800mA Available Load Current
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
Space Saving 5-Pin TSOT23 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
MP2105
SW
FB
3
5
EN
GND
2
IN
1
4
OUTPUT
1.8V
800mA
INPUT
2.5V to 6V
MP2105_TAC_S01
OFF ON
100
90
80
70
60
50
40
30
20
10
0
E
10
100
1000
LOAD CURRENT (mA)
MP2105-EC01
Efficiency vs
Load Current
V
IN
= 3.3V
V
IN
= 4.2V
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