LP2966 Dual 150mA Ultra Low-Dropout Regulator
April 2000
LP2966
Dual 150mA Ultra Low-Dropout Regulator
General Description
The LP2966 dual ultra low-dropout (LDO) regulator operates
from a +2.70V to +7.0V input supply. Each output delivers
150mA over full temperature range. The IC operates with ex-
tremely low drop-out voltage and quiescent current, which
makes it very suitable for battery powered and portable ap-
plications. Each LDO in the LP2966 has independent shut-
down capability. The LP2966 provides low noise perfor-
mance with low ground pin current in an extremely small
MSOP-8 package (refer to package dimensions and connec-
tion diagram for more information on MSOP-8 package). A
wide range of preset voltage options are available for each
output. In addition to the voltage combinations listed in the
ordering information table, many more are available upon re-
quest with minimum orders. In all, 256 voltage combinations
are possible.
Features
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Ultra low drop-out voltage
Low ground pin current
<
1µA quiescent current in shutdown mode
Independent shutdown of each LDO regulator
Output voltage accuracy
±
1%
Guaranteed 150mA output current at each output
Low output noise
Error Flags indicate status of each output
Available in MSOP-8 surface mount packages
Low output capacitor requirements (1µF)
Operates with Low ESR ceramic capacitors in most
applications
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Over temperature/over current protection
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-40˚C to +125˚C junction temperature range
Key Specifications
Dropout Voltage:
Varies linearly with load current. Typically
0.9 mV at 1mA load current and 135mV at 150mA load cur-
rent.
Ground Pin Current:
Typically 300µA at 1mA load current
and 340µA at 100mA load current (with one shutdown pin
pulled low).
Shutdown Mode:
Less than 1µA quiescent current when
both shutdown pins are pulled low.
Error Flag:
Open drain output, goes low when the corre-
sponding output drops 10% below nominal.
Precision Output Voltage:
Multiple output voltage options
available ranging from 1.8V to 5.0V with a guaranteed accu-
racy of
±
1% at room temperature.
Applications
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Cellular and Wireless Applications
Palmtop/Laptop Computer
GPS systems
Flat panel displays
Post regulators
USB applications
Hand held equipment and multimeters
Wireless data terminals
Other battery powered applications
Typical Application Circuit
DS100850-30
*SD1 and SD2 must be actively terminated through a pull up resistor. Tie to V
IN
if not used.
**ERROR1 and ERROR2 are open drain outputs. These pins must be connected to ground if not used.
# Minimum output capacitance is 1µF to insure stability over full load current range. More capacitance improves superior dynamic performance and provides
additional stability margin.
© 2000 National Semiconductor Corporation
DS100850
www.national.com
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