LP2952 National Semiconductor, LP2952 Datasheet - Page 4

• Manufacturer Part Number: LP2952
• Description: Adjustable Micropower Low-Dropout Voltage Regulators
• Manufacturer: National Semiconductor

www.national.com
Symbol
REGULATOR
V
I
I
I
I
e
V
I
I
GND
GND
GND
LIMIT
B
O
Limits in standard typeface are for T
anteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless other-
wise specified: V
Tap pin, Output pin is tied to Output Sense pin.
n
IN
REF
(FB)
Electrical Characteristics
(SINK) Output “OFF” Pulldown
–V
O
Dropout Voltage
(Note 7)
Ground Pin Current
(Note 8)
Ground Pin Current at
Dropout
Ground Pin Current at
Shutdown (Note 8)
Current Limit
Thermal Regulation
Output Noise Voltage
(10 Hz to 100 kHz)
I
Reference Voltage
Reference Voltage
Line Regulation
Reference Voltage
Load Regulation
Reference Voltage
Temp. Coefficient
Feedback Pin Bias
Current
Current
L
= 100 mA
Parameter
IN
= V
O
(NOM) + 1V, I
I
I
I
I
I
I
I
I
V
I
V
V
(Note 10)
C
C
C
(Note 12)
V
V
(Note 13)
I
(Note 5)
(Note 9)
L
L
L
L
L
L
L
L
L
REF
J
IN
SHUTDOWN
OUT
L
L
L
IN
IN
= 1 mA
= 50 mA
= 100 mA
= 250 mA
= 1 mA
= 50 mA
= 100 mA
= 250 mA
= 100 µA
= 25˚C, bold typeface applies over the full operating temperature range. Limits are guar-
L
= 4.7 µF
= 33 µF
= 33 µF (Note 11)
= V
= 2.5V to V
= V
= 1 mA, C
= 0 to 200 µA
= 0
O
O
(Continued)
Conditions
(NOM) −0.5V
(NOM) + 1V to 30V
1.1V
L
O
(NOM) + 1V
= 2.2 µF for 5V parts and 4.7µF for 3.3V parts. Feedback pin is tied to V
4
Typical
1.230
0.05
0.03
0.25
240
310
470
130
165
105
380
400
260
1.1
4.5
60
21
80
20
20
1.215
1.205
Min
LP2952AI-3.3,
LP2953AI-3.3,
(Notes 16, 17)
30
20
LP2953AM
LP2952AI,
LP2953AI,
1.245
1.255
Max
100
150
300
420
400
520
600
800
170
200
210
240
140
500
530
2.5
0.2
0.1
0.2
0.4
0.6
28
33
40
60
2
6
8
LP2952I, LP2953I,
1.205
1.190
Min
30
20
LP2952I-3.3,
LP2953I-3.3
1.255
1.270
Max
100
150
300
420
400
520
600
800
170
200
210
240
140
500
530
2.5
0.2
0.2
0.4
0.8
1.0
28
33
40
60
2
6
8
ppm/˚C
Units
%/W
RMS
mV
mA
mA
mA
µA
µA
µA
µV
nA
%
%
V