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L6926D013TR Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6926D013TR
Description  HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6926D013TR Datasheet(HTML) 1 Page - STMicroelectronics

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L6926D
May 2003
s
2V TO 5.5V BATTERY INPUT RANGE
s
HIGH EFFICIENCY: UP TO 95%
s
INTERNAL SYNCHRONOUS SWITCH
s
NO EXTERNAL SCHOTTKY REQUIRED
s
EXTREMELY LOW QUIESCENT CURRENT
s
1
µA MAX SHUTDOWN SUPPLY CURRENT
s
800mA MAX OUTPUT CURRENT
s
ADJUSTABLE OUTPUT VOLTAGE FROM 0.6V
s
LOW DROP-OUT OPERATION: UP TO100%
DUTY CYCLE
s
SELECTABLE LOW NOISE/LOW
CONSUMPTION MODE AT LIGHT LOAD
s
POWER GOOD SIGNAL
s
±1% OUTPUT VOLTAGE ACCURACY
s
CURRENT-MODE CONTROL
s
600kHz SWITCHING FREQUENCY
s
EXTERNALLY SYNCHRONIZABLE FROM
500kHz TO 1.4MHz
s
OVP
s
SHORT CIRCUIT PROTECTION
APPLICATIONS
s
BATTERY-POWERED EQUIPMENTS
s
PORTABLE INSTRUMENTS
s
CELLULAR PHONES
s
PDAs AND HAND HELD TERMINALS
s
DSC
s
GPS
DESCRIPTION
The device is dc-dc monolithic regulator specifically
designed to provide extremely high efficiency.
L6926D supply voltage can be as low as 2V allowing
its use in single Li-ion cell supplied applications. Out-
put voltage can be selected by an external divider
down to 0.6V. Duty Cycle can saturate to 100% al-
lowing low drop-out operation. The device is based
on a 600kHz fixed-frequency, current mode-architec-
ture. Low Consumption Mode operation can be se-
lected at light load conditions, allowing switching
losses to be reduced. L6926D is externally synchro-
nizable with a clock which makes it useful in noise-
sensitive applications. Other features like Power-
good, Overvoltage protection, Shortcircuit protection
and Thermal Shutdown (150°C) are also present.
MSOP8
ORDERING NUMBERS: L6926D
L6926D013TR (Tape & Reel)
HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS
STEP DOWN REGULATOR
APPLICATION TEST CIRCUIT
L 6.8
µH
SYNC
LX
VFB
C1
10
µF
6.3V
C2
220pF
C4
10
µF
6.3V
R2
200K
R3
500K
R1
100K
VIN=2V to 5.5V
VOUT=1.8V
VCC
RUN
COMP
GND
PGOOD
D01IN1305
7
6
1
8
3
5
24


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