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L6920 Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6920
Description  1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6920 Datasheet(HTML) 1 Page - STMicroelectronics

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L6920
February 2005
1
Features
0.6 TO 5.5V OPERATING INPUT VOLTAGE
1V START UP INPUT VOLTAGE
INTERNAL SYNCHRONOUS RECTIFIER
ZERO SHUT DOWN CURRENT
3.3V AND 5V FIXED OR ADJUSTABLE
OUTPUT VOLTAGE (2V UP TO 5.2V)
120m
Ω INTERNAL ACTIVE SWITCH
LOW BATTERY VOLTAGE DETECTION
REVERSE BATTERY PROTECTION
1.1 Applications
ONE TO THREE CELL BATTERY DEVICES
PDA AND HAND HELD INSTRUMENTS
CELLULAR PHONES - DIGITAL CORDLESS
PHONE
PAGERS
GPS
DIGITAL CAMERAS
2
Description
The L6920 is a high efficiency step-up controller re-
quiring only three external components to realize the
conversion from the battery voltage to the selected
output voltage.
The start up is guaranteed at 1V and the device is op-
erating down to 0.6V.
Internal synchronous rectifier is implemented with a
120m
Ω P-channel MOSFET and, in order to improve
the efficiency, a variable frequency control is imple-
mented.
1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER
Figure 1. Application Circuit
L1
LX
8
OUT
1
FB
3
6
LBO
GND
SHDN
7
5
LBI
2
REF
4
VCC
VOUT
2.5V
3.3V
500mA
L6920D
C2
C3
C1
Figure 1. Package
Table 1. Order Codes
Part Number
Package
L6920D
TSSOP8 Tube
L6920DTR
Tape & Reel
TSSOP8
Rev. 2


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