LP2950 View Datasheet(PDF) - First Components International
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LP2950 Datasheet PDF : 3 Pages
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LP2950/LP2951 100mA Low Drop Out Voltage Regulators
ELECTRICALCHARACTERISTICS(atT a=25oC,VIN=15V;unlessotherwisenoted)
Output Voltage
Parameter
Output Voltage
Output Voltage Temperature Coefficient
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage (Note 5)
Ground Current
Dropout Ground Current
Current Limit
Thermal Regulation
Conditions (Note 2)
-25°C≤TJ≤85°C
Full Operating Temperature
100µA ≤ IL ≤ 100mA, TJ≤TJMAX
(Note 1)
V0 + 1V ≤ Vin ≤ 30V (Note 4)
100µA ≤ IL ≤ 100mA
IL=100 µA
IL=100 mA
IL=100 µA
IL=100 mA
Vin=V0 - 0.5V, IL=100 µA
Vout=0
Min
0.985 |V0|
0.98 |V0|
0.976|V0|
Typ
V0
V0
50
0.04
0.1
50
380
75
8
110
160
0.05
Max
1.015 |V0|
1.02 |V0|
1.024 |V0|
150
0.4
0.3
80
450
120
12
170
200
0.2
Units
V
ppm/°C
%
%
mV
µA
mA
µA
mA
%/W
Output Noise, 10Hz to 100KHz
8-pin Versions only
CL=1µF
CL=200µF
CL=3.3µF
(Bypass=0.01 µF pins 7 to 1
(LP2951-XX))
430
µV rms
160
100
Reference Voltage
Reference Voltage
Over Temperature (Note 6)
1.21
1.235
1.26
V
1.185
1.285
Feedback Pin Bias Current
Reference Voltage Temperature Coefficient
Feedback Pin Bias Current Temperature Coefficient
Error Comparator
(Note 7)
20
40
nA
50
ppm/°C
0.1
nA/°C
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Shutdown Input
Voh=30V
Vin=4.5V, IOL=400 µA
(Note 8)
(Note 8)
(Note 8)
0.01
1.0
µA
150
250
mV
40
60
75
95
15
Input Logic Voltage
Low (Regulator ON)
1.3
0.7
V
High (Regulator OFF)
2
Shut down Pin Input Current
Regulator Output Current in Shutdown
VS=2.4V
VS=30V
(Note 9)
30
50
450
600
VOUT = 5.0 V
3
10
µA
3.3V ≤ VOUT < 5.0 V
20
2.0V ≤ VOUT < 3.3 V
30
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.
Note 2: Unless otherwise specified all limits guaranteed for TJ = 25°C, Vin = V0 + 1V, IL = 100µA and CL = 1µF. Additional conditions for the
8-pin versions are feedback tied to -XX V tap and output tied to output Sense (Vout = XX V) and Vshutdown ≤ 0.8 V
Note 3: Regulations is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
Note 4: Line regulation for LP2951-XX is tested at 150°C for IL = 1mA. For IL = 100µA and TJ = 125°C, line regulation is guaranteed by design to
0.2%. See typical performance characteristics for line regulation versus temperature and load current.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV 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.
Note 6: Vref ≤ Vout ≤ (Vin - 1V), 2.3V ≤ Vin ≤ 30V, 100µA ≤ IL ≤ 100mA, TJ ≤ TJMAX
Note 7: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range
Note 8: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage
measured at V0 + 1V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = Vout/Vref= (R1 +
R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x 5V/
1.235V=384mV. Thresholds remain constant as a percent of Vout as Vout is varied , with the dropout warning occurring at typically 5% below
nominal, 7.5% guaranteed.
Note 9: Vshutdown ≥ 2V, Vin ≤ 30V, Vout = 0, Feed-back pin tied to -XX V Tap.
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