LP2954A_15 Datasheet, PDF (3/24 Pages) Texas Instruments – LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators

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.
Symbol
Parameter
Conditions
Typical
2954AI
Min
Max
2954I
Min
Max
Units
V_O
Output Voltage⁽¹⁾
5.0
4.975
5.025
4.950
5.050
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.
Coefficient ⁽¹⁾
See ⁽²⁾
20
100
150
ppm/°C
V_IN = 6V to 30V
0.03
Line Regulation
0.10
0.20
0.20
%
0.40
V_IN–V_O
I_GND
I_GND
I_LIMIT
Load Regulation
I_L = 1 to 250 mA
I_L = 0.1 to 1 mA⁽³⁾
I_L = 1 mA
Dropout Voltage⁽⁴⁾
I_L = 50 mA
I_L = 100 mA
I_L = 250 mA
I_L = 1 mA
Ground Pin Current⁽⁵⁾
I_L = 50 mA
I_L = 100 mA
I_L = 250 mA
Ground Pin Current at
Dropout ⁽⁵⁾
Current Limit
V_IN = 4.5V
V_OUT = 0V
0.04
60
240
310
470
90
1.1
4.5
21
120
380
0.16
0.20
100
150
300
420
400
520
600
800
150
180
2
2.5
6
8
28
33
170
210
500
530
0.20
%
0.30
100
150
300
420
mV
400
520
600
800
150
μA
180
2
2.5
6
mA
8
28
33
170
μA
210
500
mA
530
Thermal Regulation
See ⁽⁶⁾
0.05
0.2
0.2
%/W
e_n
Output Noise Voltage ^{CL = 2.2 μF}
400
(10 Hz to 100 kHz)
C_L = 33 μF
260
I_L = 100 mA
C_L=33μF ⁽⁷⁾
80
μV RMS
(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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