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L6926 Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6926
Description  HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6926 Datasheet(HTML) 1 Page - STMicroelectronics

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L6926
November 2004
1
FEATURES
2V TO 5.5V BATTERY INPUT RANGE
HIGH EFFICIENCY: UP TO 95%
INTERNAL SYNCHRONOUS SWITCH
NO EXTERNAL SCHOTTKY REQUIRED
EXTREMELY LOW QUIESCENT CURRENT
1
µA MAX SHUTDOWN SUPPLY CURRENT
800mA MAX OUTPUT CURRENT
ADJUSTABLE OUTPUT VOLTAGE FROM 0.6V
LOW DROP-OUT OPERATION: UP TO100%
DUTY CYCLE
SELECTABLE LOW NOISE/LOW
CONSUMPTION MODE AT LIGHT LOAD
POWER GOOD SIGNAL
±1% OUTPUT VOLTAGE ACCURACY
CURRENT-MODE CONTROL
600kHz SWITCHING FREQUENCY
EXTERNALLY SYNCHRONIZABLE FROM
500kHz TO 1.4MHz
OVP
SHORT CIRCUIT PROTECTION
2
APPLICATIONS
BATTERY-POWERED EQUIPMENTS
PORTABLE INSTRUMENTS
CELLULAR PHONES
PDAs AND HAND HELD TERMINALS
DSC
GPS
3
DESCRIPTION
The device is dc-dc monolithic regulator specifically
designed to provide extremely high efficiency.
L6926 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. L6926 is externally synchroni-
zable with a clock which makes it useful in noise-sen-
sitive applications. Other features like Powergood,
Overvoltage protection, Shortcircuit protection and
Thermal Shutdown (150°C) are also present.
HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS
STEP DOWN REGULATOR
Figure 2. 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
Figure 1. Packages
Table 1. Order Codes
Part Number
Package
L6926
MSOP8 in Tube
L6926013TR
MSOP8 in Tape & Reel
L6926D1
VFSON-8 in Tube
L6926D1013TR
VFSON8 in Tape & Reel
VFSON8 (3x4.9x1mm)
MSOP8
Rev. 4


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