Datasheet

LP2954, LP2954A
www.ti.com SNVS096D –JUNE 1999–REVISED MARCH 2013
Electrical Characteristics
Limits in standard typeface are for T
J
= 25°C, bold typeface applies over the −40°C to +125°C temperature range. Limits
are specified by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless
otherwise noted: V
IN
= 6V, I
L
= 1 mA, C
L
= 2.2 μF.
2954AI 2954I
Symbol Parameter Conditions Typical Units
Min Max Min Max
V
O
5.0 4.975 5.025 4.950 5.050
Output Voltage
(1)
4.940 5.060 4.900 5.100 V
1 mA ≤ I
L
≤ 250 mA 5.0 4.930 5.070 4.880 5.120
Output Voltage Temp.
See
(2)
20 100 150 ppm/°C
Coefficient
(1)
V
IN
= 6V to 30V 0.03 0.10 0.20
Line Regulation %
0.20 0.40
I
L
= 1 to 250 mA 0.16 0.20
Load Regulation %
I
L
= 0.1 to 1 mA
(3)
0.04
0.20 0.30
V
IN
–V
O
I
L
= 1 mA 60 100 100
150 150
I
L
= 50 mA 240 300 300
420 420
Dropout Voltage
(4)
mV
I
L
= 100 mA 310 400 400
520 520
I
L
= 250 mA 470 600 600
800 800
I
GND
I
L
= 1 mA 90 150 150
μA
180 180
I
L
= 50 mA 1.1 2 2
2.5 2.5
Ground Pin Current
(5)
I
L
= 100 mA 4.5 6 6
mA
8 8
I
L
= 250 mA 21 28 28
33 33
I
GND
V
IN
= 4.5V 170 170
Ground Pin Current at
μA
Dropout
(5)
120 210 210
I
LIMIT
V
OUT
= 0V 380 500 500
Current Limit mA
530 530
Thermal Regulation See
(6)
0.05 0.2 0.2 %/W
e
n
C
L
= 2.2 μF 400
Output Noise Voltage
(10 Hz to 100 kHz) C
L
= 33 μF 260 μV RMS
I
L
= 100 mA
C
L
=33μF
(7)
80
(1) When used in dual-supply systems where the regulator load is returned to a negative supply, the output voltage must be diode-clamped
to ground.
(2) Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
(3) Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested separately for load
regulation in the load ranges 0.1 mA–1 mA and 1 mA–250 mA. Changes in output voltage due to heating effects are covered by the
thermal regulation specification.
(4) Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a
1V differential.
(5) Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the
ground pin current.
(6) Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load
or line regulation effects. Specifications are for 200 mA load pulse at V
IN
= 20V (3W pulse) for T = 10 ms.
(7) Connect a 0.1μF capacitor from the output to the feedback pin.
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