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CR43-4R7

CR43-4R7首页预览图
型号: CR43-4R7
PDF文件:
  • CR43-4R7 PDF文件
  • CR43-4R7 PDF在线浏览
功能描述: 1MHz, 800mA Synchronous Step-Down Converter
PDF文件大小: 270.11 Kbytes
PDF页数: 共8页
制造商: MPS[Monolithic Power Systems]
制造商LOGO: MPS[Monolithic Power Systems] LOGO
制造商网址: http://www.monolithicpower.com
捡单宝CR43-4R7
PDF页面索引
120%
MP2105
1MHz, 800mA Synchronous
Step-Down Converter
MP2105 Rev. 1.2 www.MonolithicPower.com 1
8/19/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
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 Dimensions
EV2105DJ-00A 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
EFFICIENCY (%)
10 100 1000
LOAD CURRENT (mA)
MP2105-EC01
Efficiency vs
Load Current
V
IN
= 3.3V
V
IN
= 4.2V
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