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SPX2954 Datasheet(PDF) 4 Page - Sipex Corporation

Part # SPX2954
Description  250mA Low Dropout Voltage Regulator
PDF  17 Pages
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SPX2954 Datasheet(HTML) 4 Page - Sipex Corporation

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Date: 12/9/05
SPX2954, 250mA Low Dropout Voltage Regulator
© Copyright 2005 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown Threshold Voltage
1.8
1.6
1.0
-75
TEMPERATURE (ºC)
1.4
1.2
0.8
0.6
-50
-25
0
25
50
75 100 125 150
Thermal Response
4
2
1
0
TIME (
µs)
0
-2
0
-1
10
20
30
40
50
5
1.25W
~
~
Output Noise
3.5
2.5
2.0
0.0
10 2
10 3
10 4
10 5
FREQUENCY (Hz), C BYP=0.1uF
3.0
1.5
1.0
0.5
C = 3.3
µF
L
Ripple Rejection
80
60
40
10
10 1
10 3
10 4
10 6
FREQUENCY (Hz)
I
L = 50µA
I
L = 100mA
C
L = 1µF
V
IN = 6V
V
OUT = 5V
70
50
30
20
10 2
10 5
Line Regulation
30
25
20
10
5
INPUT VOLTAGE (V)
15
10
5
0
5
0
-5
-10
10
15
20
25
30
~
~
I
L = 100µA
I
L = 1mA
T
J = 150 ºC
T
J = 125 ºC
I
L = 100µA
C
= 0.1
µF
BYP
C
L = 220µF
I
L = 100mA
C
L = 1µF
I
L=50mA
SPX2954 Block Diagram, 8 Lead 5V Version
INPUT
OUTPUT
UNREGULATED DC
SHUTDOWN
GROUND
ERROR
______
SENSE
TO CMOS OR
TTL
REFERENCE
ERROR DETECTION
COMPARATOR
ERROR
AMPLIFIER
1.23V
FROM
CMOS OR
TTL
+
+
+
+
+
+
60 mV
3
7
8
1
2
6
5
4
60kΩ
330kΩ
180kΩ
.
.
1µF
_
_
FEEDBACK
5V TAP
5V



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