LP2950-N, LP2951-N
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SNVS764N –JANUARY 2000–REVISED MAY 2013
ELECTRICAL CHARACTERISTICS(1) (continued)
LP2950AC-XX
LP2951AC-XX
LP2950C-XX
LP2951C-XX
LP2951
Parameter
Conditions(1)
Units
Typ
Tested
Typ
Tested Design Typ
Limit(2) Limit(4)
Tested Design
Limit(2) Limit(4)
Limit(2)(3)
Load Regulation(7)
Dropout Voltage(9)
100 μA ≤ IL ≤ 100 mA
IL = 100 μA
0.04
0.1
0.3
80
0.04
0.1
0.1
0.2
0.3
80
% max
% max
0.2
80
mV
max
50
150
450
600
50
150
50
150
mV
max
IL = 100 mA
450
450
mV
max
380
75
380
75
600
140
14
380
75
600
mV
max
Ground Current
IL = 100 μA
120
140
12
120
12
120
140
12
μA max
μA max
IL = 100 mA
8
8
8
mA
max
14
14
mA
max
Dropout Ground
Current
Vin = (VONOM − 0.5)V
IL = 100 μA
110
160
170
200
200
110
160
170
200
110
160
170
200
200
μA max
μA max
200
220
Current Limit
Vout = 0
mA
max
220
220
mA
max
Thermal Regulation
See(10)
0.05
0.2
0.05
0.2
0.05
0.2
%/W
max
Output Noise, 10 Hz to CL = 1μF (5V Only)
430
160
100
430
160
100
430
160
100
μV rms
μV rms
μV rms
100 kHz
CL = 200 μF
CL = 3.3 μF
(Bypass = 0.01 μF
Pins 7 to 1 (LP2951-N)
8-pin Versions Only
LP2951
LP2951AC-XX
LP2951C-XX
Reference Voltage
1.23
5
1.25
1.23
5
1.25
1.23
5
1.26
V max
1.26
1.22
1.2
1.26
1.27
V max
V min
1.22
40
1.21
1.2
1.2
V min
Reference Voltage
See(11)
1.27
1.19
40
1.27
1.19
1.285
1.185
40
V max
V min
Feedback Pin Bias
Current
20
20
20
20
20
50
nA max
nA max
ppm/°C
60
60
60
Reference Voltage
Temperature
Coefficient
See(12)
Feedback Pin Bias
Current Temperature
Coefficient
0.1
0.1
0.1
nA/°C
(9) Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value
measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over
temperature) must be taken into account.
(10) 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 a 50 mA load pulse at VIN = 30V (1.25W pulse) for T = 10ms.
(11) VREF ≤ VOUT ≤ (VIN − 1V), 2.3V ≤ VIN ≤ 30V, 100 μA ≤ IL ≤ 100 mA, TJ ≤ TJMAX
.
(12) Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
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