L6926D Datasheet, PDF (1/8 Pages) STMicroelectronics – HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR

L6926D
HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS
STEP DOWN REGULATOR
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 1µA 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
APPLICATION TEST CIRCUIT
MSOP8
ORDERING NUMBERS: L6926D
L6926D013TR (Tape & Reel)
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.
V_IN=2V to 5.5V
C1
10µF
6.3V
SYNC
7
V_CC
6
RUN
1
2
COMP
D01IN1305
C2
220pF
L 6.8µH
5
LX
R3
500K
8
PGOOD
3
4
VFB
GND
R2
200K
R1
100K
V_OUT=1.8V
C4
10µF
6.3V
May 2003
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