LP2956 Datasheet, PDF (3/16 Pages) National Semiconductor (TI) – Dual Micropower Low-Dropout Voltage Regulators

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
Lead Temperature
(Soldering, 5 seconds)
Power Dissipation (Note 2)
−65˚C to +150˚C
−40˚C to +125˚C
260˚C
Internally Limited
Input Supply Voltage
Feedback Input Voltage (Note 3)
Aux. Feedback Input Voltage (Note 3)
Shutdown Input Voltage (Note 3)
Comparator Input Voltage (Notes 3,
4)
Comparator Output Voltage (Notes 3,
4)
ESD Rating (Note 16)
−20V to +30V
−0.3V to +5V
−0.3V to +5V
−0.3V to +30V
−0.3V to +30V
−0.3V to +30V
2 kV
Electrical Characteristics
Limits in standard typeface are for T_J = 25˚C, and limits in boldface type apply over the full operating temperature range. Lim-
its are guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods.
Unless otherwise specified:
pin, C_IN = 1 µF, V_SD = 0V,
V_IN = 6V, C_L =
Main Output pin
2.2 µF
is tied
(Main Output) and 10 µF (Auxiliary Output), Feedback pin is
to Output Sense pin, Auxiliary Output is programmed for 5V.
tied to 5V
The main
Tap
regulator output has a 1 mA load, the auxiliary regulator output has a 100 µA load.
Symbol
Parameter
Conditions
Typical LP2956AI
LP2956I
Units
Min Max Min Max
MAIN OUTPUT
V_O
Output Voltage
5.0 4.975 5.025 4.950 5.050
4.940 5.060 4.900 5.100
V
Temperature Coefficient
1 mA ≤ I_L ≤ 250 mA
(Note 5)
5.0 4.930 5.070 4.880 5.120
20
100
150 ppm/˚C
Line Regulation
Load Regulation
V_IN– V_O
Dropout Voltage
(Note 7)
I_LIMIT
Current Limit
Thermal Regulation
V_IN = 6V to 30V
I_L = 1 mA to 250 mA
I_L = 0.1 mA to 1 mA (Note 6)
I_L = 1 mA
I_L = 50 mA
I_L = 100 mA
I_L = 250 mA
R_L = 1Ω
(Note 8)
0.03
0.04
60
240
310
470
380
0.05
0.1
0.2
%
0.2
0.4
0.16
0.20
%
0.20
0.30
100
100
150
150
300
300
420
420
mV
400
400
520
520
600
600
800
800
500
500
mA
530
530
0.2
0.2
%/W
e_n
Output Noise Voltage
(10 Hz to 100 KHz)
I_L = 100 mA
V_FB
Feedback Pin Voltage
I_FB
Feedback Pin Bias
Current
I_O
(OFF)
Output Leakage
In Shutdown
AUXILIARY OUTPUT
V_FB
Feedback Pin Voltage
C_L = 2.2 µF
C_L = 33 µF
C_L = 33 µF (Note 9)
I_{(SD IN)} ≥ 1 µA
V_IN = 30V, V_OUT = 0V
400
260
µV RMS
80
1.23 1.215 1.245 1.205 1.255
V
20
40
40
nA
60
60
3
10
10
µA
20
20
1.23 1.22 1.25 1.21 1.26
V
1.21 1.26 1.20 1.27
3
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