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LP2966 Datasheet

Dual 150mA Ultra Low-Dropout Regulator

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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.
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.
Features
n Ultra low drop-out voltage
n Low ground pin current
n <1µA quiescent current in shutdown mode
n Independent shutdown of each LDO regulator
n Output voltage accuracy ±1%
n Guaranteed 150mA output current at each output
n Low output noise
n Error Flags indicate status of each output
n Available in MSOP-8 surface mount packages
n Low output capacitor requirements (1µF)
n Operates with Low ESR ceramic capacitors in most
applications
n Over temperature/over current protection
n -40˚C to +125˚C junction temperature range
Applications
n Cellular and Wireless Applications
n Palmtop/Laptop Computer
n GPS systems
n Flat panel displays
n Post regulators
n USB applications
n Hand held equipment and multimeters
n Wireless data terminals
n Other battery powered applications
Typical Application Circuit
DS100850-30
*SD1 and SD2 must be actively terminated through a pull up resistor. Tie to VIN 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


National Semiconductor Electronic Components Datasheet

LP2966 Datasheet

Dual 150mA Ultra Low-Dropout Regulator

No Preview Available !

Block Diagram
Connection Diagram
DS100850-31
Pin Description
DS100850-32
Top View
Mini SO-8 Package
8-Lead Small Outline Integrated Circuit (SOIC)
Package Code: MSOP-8
Pin Name
Function
1 VIN
Input Supply pin
2 SD1 Active low shutdown pin for output 1
3 SD2 Active low shutdown pin for output 2
4 GND Ground
5 ERROR2 Error flag for output 2 - Normally high impedance, should be connected to ground if not
used.
6 ERROR1 Error flag for output 1 - Normally high impedance, should be connected to ground if not
used.
7 VOUT2 Output 2
8 VOUT1 Output 1
www.national.com
2


Part Number LP2966
Description Dual 150mA Ultra Low-Dropout Regulator
Maker National Semiconductor
PDF Download

LP2966 Datasheet PDF






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