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L6920DCTR 데이터 시트보기 (PDF) - STMicroelectronics

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L6920DCTR
ST-Microelectronics
STMicroelectronics ST-Microelectronics
L6920DCTR Datasheet PDF : 16 Pages
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L6920DC
Synchronous rectifier step up converter
General features
0.8V start up input voltage
Up to 5.5V operating input voltage
Internal synchronous rectifier
Adjustable output voltage from 1.8V to 5.5V
3.3V and 5V fixed output voltages
Low battery voltage detection
Reverse battery protection
550mA minimum input current limit
Switching frequency up to 1MHz
1.23V reference voltage available
Applications
Conversion from 1 to 3 alkaline,
NiMH, NiCd battery cells or 1 lithium ION
PDA and handheld instruments
Digital cameras
Cellular phones
GPS
Distributed power
Application circuit
MSOP8
Description
The L6920DC is a high efficiency monolithic step
up switching converter IC especially designed for
battery powered application.
Package is MSOP8 in order to minimize PCB
space. It requires only three external components
to realize the conversion from the battery voltage
to the selected output voltage.
The minimum output voltage is 1.8V: suitable to
supply the most advanced ASIC and µP.
High switching frequency allows for a low profile,
small sized inductor and output capacitor to be
used.
Reference voltage, low battery detection and
Shutdown are provided together with over current,
over voltage.
L6920DC
3.3V
June 2006
Rev 1
1/16
www.st.com
16

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