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LP2956 数据表(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LP2956
功能描述  Dual Micropower Low-Dropout Voltage Regulators
PDF  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP2956 数据表(HTML) 4 Page - National Semiconductor (TI)

  LP2956 Datasheet HTML 1Page - National Semiconductor (TI) LP2956 Datasheet HTML 2Page - National Semiconductor (TI) LP2956 Datasheet HTML 3Page - National Semiconductor (TI) LP2956 Datasheet HTML 4Page - National Semiconductor (TI) LP2956 Datasheet HTML 5Page - National Semiconductor (TI) LP2956 Datasheet HTML 6Page - National Semiconductor (TI) LP2956 Datasheet HTML 7Page - National Semiconductor (TI) LP2956 Datasheet HTML 8Page - National Semiconductor (TI) LP2956 Datasheet HTML 9Page - National Semiconductor (TI) Next Button
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Symbol
Parameter
Conditions
Typical
LP2956AI
LP2956I
Units
Min
Max
Min
Max
AUXILIARY OUTPUT
V
FB
Feedback Pin Voltage
1.23
1.22
1.25
1.21
1.26
V
1.21
1.26
1.20
1.27
Feedback Voltage
Temperature Coefficient
20
ppm/°C
I
FB
Feedback Pin Bias
10
20
20
nA
Current
30
30
Line Regulation
6V
≤ V
IN ≤ 30V
0.07
0.3
0.4
%
0.5
0.6
Load Regulation
I
L = 0.1 mA to 1 mA
0.1
0.3
0.4
%
I
L = 1 mA to 75 mA (Note 10)
0.6
1.0
V
IN–VO
Dropout Voltage
I
L = 1 mA
100
200
200
mV
300
300
I
L = 50 mA
400
600
600
mV
700
700
I
L = 75 mA
500
700
700
mV
850
850
e
n
Output Noise
C
L = 10 μF
300
(10 Hz–100 KHz)
C
L = 33 μF (Note 9)
100
μV RMS
I
L = 10 mA
I
LIM
Current Limit
V
OUT = 0V (Note 13)
80
200
200
mA
250
250
Thermal Regulation
(Note 8)
0.2
0.5
0.5
%/W
DROPOUT DETECTION COMPARATOR
I
OH
Output “HIGH” Leakage
V
OH = 30V
0.01
1
1
μA
2
2
V
OL
Output “LOW” Voltage
V
IN = 4V
150
250
250
mV
I
O (COMP) = 400 μA
400
400
V
THR
Upper Threshold Voltage
(Note 11)
−240
−320
−150
−320
−150
mV
(max)
−380
−100
−380
−100
V
THR
Lower Threshold Voltage
(Note 11)
−350
−450
−230
−450
−230
mV
(min)
−640
−160
−640
−160
HYST
Hysteresis
(Note 11)
110
mV
SHUTDOWN INPUT
I
IN
Input Current to Disable
Output
(Note 12)
0.03
0.5
0.5
μA
V
IH
Shutdown Input High
I
(SD IN) ≥ 1 μA
900
900
mV
Threshold
1200
1200
V
IL
Shutdown Input Low
V
O ≥ 4.5V
400
400
mV
Threshold
200
200
AUXILIARY COMPARATOR
V
T(high)
Upper Trip Point
(Note 14)
1.236
1.20
1.28
1.20
1.28
V
1.19
1.29
1.19
1.29
V
T(low)
Lower Trip Point
(Note 14)
1.230
1.19
1.27
1.19
1.27
V
1.18
1.28
1.18
1.28
HYST
Hysteresis
6
mV
www.national.com
4
11339 Version 8 Revision 4
Print Date/Time: 2009/12/07 17:53:15



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