LP2956 Datasheet, PDF (4/16 Pages) National Semiconductor (TI) – Dual Micropower Low-Dropout Voltage Regulators

Electrical Characteristics (Continued)
Limits in standard typeface are for T_J = 25˚C, and limits in boldface type apply over the full operating temperature range. Lim-
its are guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods.
Unless otherwise specified: V_IN = 6V, C_L = 2.2 µF (Main Output) and 10 µF (Auxiliary Output), Feedback pin is tied to 5V Tap
pin, C_IN = 1 µF, V_SD = 0V, Main Output pin is tied to Output Sense pin, Auxiliary Output is programmed for 5V. The main
regulator output has a 1 mA load, the auxiliary regulator output has a 100 µA load.
Symbol
Parameter
Conditions
Typical LP2956AI
LP2956I
Units
Min Max Min Max
AUXILIARY OUTPUT
Feedback Voltage
20
Temperature Coefficient
ppm/˚C
I_FB
Feedback Pin Bias
Current
Line Regulation
Load Regulation
V_IN– V_O
Dropout Voltage
e_n
Output Noise
(10 Hz–100 KHz)
I_LIM
Current Limit
Thermal Regulation
10
6V ≤ V_IN ≤ 30V
0.07
I_L = 0.1 mA to 1 mA
0.1
I_L = 1 mA to 75 mA (Note 10)
I_L = 1 mA
100
I_L = 50 mA
400
I_L = 75 mA
500
C_L = 10 µF
300
C_L = 33 µF (Note 9)
100
I_L = 10 mA
V_OUT = 0V (Note 13)
80
(Note 8)
0.2
20
20
nA
30
30
0.3
0.4
%
0.5
0.6
0.3
0.4
%
0.6
1.0
200
200
mV
300
300
600
600
mV
700
700
700
700
mV
850
850
µV RMS
200
200
mA
250
250
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)
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4
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