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LP2960 Datasheet

Adjustable Micropower 0.5A Low-Dropout Regulators

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April 1999
LP2960
Adjustable Micropower 0.5A Low-Dropout Regulators
General Description
The LP2960 is a micropower voltage regulator with very low
dropout voltage (12 mV typical at 1 mA load and 470 mV
typical at 500 mA load) and very low quiescent current
(450 µA typical at 1 mA load).
The LP2960 is ideally suited for battery-powered systems:
the quiescent current increases only slightly at dropout,
which prolongs battery life.
The LP2960 retains all the desirable characteristics of the
LP2953, and offers increased output current.
The error flag goes low any time the output drops more than
5% out of regulation.
Reverse battery protection is provided.
The LP2960 requires only 10 µF of output capacitance for
stability (5V version).
The internal voltage reference is made available for external
use, providing a low-T.C. reference with very good regulation
characteristics.
The parts are available in 16-pin plastic DIP and 16-pin sur-
face mount packages.
Features
n Output voltage adjusts from 1.23V–29V
n Guaranteed 500 mA output current
n 5V and 3.3V versions available
n 16-pin DIP and 16-pin SO packages
n Low dropout voltage
n Low quiescent current
n Tight line and load regulation
n Low temperature coefficient
n Current limiting and thermal protection
n Logic-level shutdown
n Can be wired for snap-ON and snap-OFF
n Reverse battery protection
Applications
n High-efficiency linear regulator
n Regulator with under-voltage shutdown
n Low dropout battery-powered regulator
n Cellular telephones
Block Diagram
© 1999 National Semiconductor Corporation DS011962
DS011962-1
www.national.com


National Semiconductor Electronic Components Datasheet

LP2960 Datasheet

Adjustable Micropower 0.5A Low-Dropout Regulators

No Preview Available !

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Operating Junction Temperature
Range
LP2960AI/LP2960I
−65˚C to +150˚C
−40˚C to +125˚C
Lead Temperature (Soldering, 5 sec.)
Power Dissipation (Note 2)
Input Supply Voltage
Feedback Input Voltage (Note 3)
Comparator Input Voltage (Note 4)
Comparator Output Voltage (Note 4)
ESD Rating (Note 15)
260˚C
Internally Limited
−20V to +30V
−0.3V to +5V
−0.3V to +30V
−0.3V to +30V
1.5 kV
Electrical Characteristics Limits in standard typeface are for TJ = 25˚C, and limits in boldface type apply
over the full operating temperature range. Unless otherwise specified: CIN = 4.7 µF, VIN = VO(NOM) + 1V, IL = 1 mA,
COUT = 10 µF for 5V parts or COUT = 22 µF for 3.3V parts, Feedback pin is tied to VTAP pin, Output pin is tied to Sense pin,
VS/D = 2V.
Symbol
Parameter
Conditions
VO Output Voltage
(5V Versions)
1 mA IL 500 mA
Output Voltage
(3.3 Versions)
1 mA IL 500 mA
Output Voltage
(Note 5)
Temperature Coefficient
Output Voltage
Line Regulation
VIN = [VO(NOM) + 1V] to 30V
Output Voltage
Load Regulation
(Note 6)
VIN − VO Dropout Voltage (Note 7) IL = 1 mA
IL = 100 mA
IL = 200 mA
IL = 500 mA
IGND
Ground Pin Current
(Note 8)
IL = 1 mA
IL = 100 mA
IL = 200 mA
IL = 500 mA
IGND
ILIMIT
Ground Pin Current
at Dropout (Note 8)
Ground Pin Current
at Shutdown (Note 8)
Current Limit
VIN = VO(NOM) − 0.5V
IL = 100 µA
VSD 1.1V
RL = 0.5
Thermal Regulation
(Note 10)
Typ
5.0
3.3
20
0.06
0.08
12
180
260
470
450
2.6
2.5
21
1.8
300
1000
0.05
LP2960AI
(Note 14)
Min Max
4.962
4.930
5.038
5.070
3.275
3.254
3.325
3.346
130
LP2960I
(Note 14)
Min Max
4.925 5.075
4.880 5.120
3.250 3.350
3.221 3.379
Units
V
160 ppm/˚C
0.2
0.5
0.16
0.30
30
50
250
350
350
450
600
800
600
750
4.0
5.0
8
10
35
40
3
5
400
1500
1600
0.2
0.4
0.8
0.20
0.40
30
50
250
350
350
450
600
800
600
750
4.0
5.0
8
10
35
40
3
5
400
1500
1600
0.2
%
%
mV
µA
mA
mA
µA
mA
%/W
en
Output Noise Voltage
COUT = 10 µF
@ IL = 100 mA
COUT = 47 µF
(10 Hz–100kHz)
COUT = 47 µF (Note 11)
300
210
130
µV RMS
www.national.com
2


Part Number LP2960
Description Adjustable Micropower 0.5A Low-Dropout Regulators
Maker National Semiconductor
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LP2960 Datasheet PDF






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