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L6926Q1TR Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6926Q1TR
Description  High efficiency monolithic synchronous step down regulator
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6926Q1TR Datasheet(HTML) 1 Page - STMicroelectronics

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October 2006
Rev 7
1/17
17
L6926
High efficiency monolithic synchronous step down regulator
General features
2V to 5.5V battery input range
High efficiency: up to 95%
Internal synchronous switch
No external schottky required
Extremely low quiescent current
1mA max shutdown supply current
800mA max output current
Adjustable output voltage from 0.6V
Low drop-out operation: up to 100% 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
Applications
Battery-powered equipments
Portable instruments
Cellular phones
PDAs and hand held terminals
DSC
GPS
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. Output voltage can be selected by
an external divider down to 0.6V.
Duty Cycle can saturate to 100% allowing low
drop-out operation.
The device is based on a 600kHz fixed-frequency,
current mode-architecture. Low Consumption
Mode operation can be selected at light load
conditions, allowing switching losses to be
reduced. L6926 is externally synchronizable with
a clock which makes it useful in noise-sensitive
applications. Other features like Powergood,
Overvoltage protection, Shortcircuit protection
and Thermal Shutdown (150°C) are also present.
VFSON8
MSOP8
VFQFPN8
(3x4.9x1mm)
(3x3x1.0mm)
www.st.com
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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