LP2956A Datasheet, PDF (4/20 Pages) National Semiconductor (TI) – Dual Micropower Low-Dropout Voltage Regulators

Symbol
Parameter
Conditions
AUXILIARY OUTPUT
V_FB
Feedback Pin Voltage
Feedback Voltage
Temperature Coefficient
I_FB
Feedback Pin Bias
Current
Line Regulation
6V ≤ V_IN ≤ 30V
Load Regulation
V_IN–V_O
Dropout Voltage
e_n
Output Noise
(10 Hz–100 KHz)
I_LIM
Current Limit
Thermal Regulation
I_L = 0.1 mA to 1 mA
I_L = 1 mA to 75 mA (Note 10)
I_L = 1 mA
I_L = 50 mA
I_L = 75 mA
C_L = 10 μF
C_L = 33 μF (Note 9)
I_L = 10 mA
V_OUT = 0V (Note 13)
(Note 8)
Typical LP2956AI
Min Max
LP2956I
Min Max
Units
1.23 1.22 1.25 1.21 1.26
V
1.21 1.26 1.20 1.27
20
ppm/°C
10
20
20
nA
30
30
0.07
0.3
0.4
%
0.5
0.6
0.1
0.3
0.4
%
0.6
1.0
100
200
200
mV
300
300
400
600
600
mV
700
700
500
700
700
mV
850
850
300
100
μV RMS
80
200
200
mA
250
250
0.2
0.5
0.5
%/W
DROPOUT DETECTION COMPARATOR
I_OH
Output “HIGH” Leakage V_OH = 30V
V_OL
Output “LOW” Voltage
V_THR
(max)
Upper Threshold Voltage
V_THR
(min)
Lower Threshold Voltage
HYST
Hysteresis
SHUTDOWN INPUT
I_IN
Input Current to Disable
Output
V_IH
Shutdown Input High
Threshold
V_IL
Shutdown Input Low
Threshold
AUXILIARY COMPARATOR
V_T(high) Upper Trip Point
V_IN = 4V
I_O (COMP) = 400 μA
(Note 11)
(Note 11)
(Note 11)
(Note 12)
I_{(SD IN)} ≥ 1 μA
V_O ≥ 4.5V
(Note 14)
V_T(low)
Lower Trip Point
(Note 14)
HYST
Hysteresis
0.01
1
1
μA
2
2
150
250
250
mV
400
400
−240 −320 −150 −320 −150
mV
−380 −100 −380 −100
−350 −450 −230 −450 −230
mV
−640 −160 −640 −160
110
mV
0.03
0.5
0.5
μA
900
900
mV
1200
1200
400
400
mV
200
200
1.236 1.20 1.28 1.20 1.28
V
1.19 1.29 1.19 1.29
1.230 1.19 1.27 1.19 1.27
V
1.18 1.28 1.18 1.28
6
mV
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11339 Version 8 Revision 4 Print Date/Time: 2009/12/07 17:53:15