SPX2954 Просмотр технического описания (PDF) - Unspecified
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SPX2954 Datasheet PDF : 15 Pages
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Functional Block Diagram
UNREGULATED DC
+
7
8
1
FEEDBACK
INPUT
OUTPUT
FROM
CMOS OR
TTL
3
SHUTDOWN
+
_
ERROR
AMPLIFIER
60 mV
+
+ 1.23V
+
_
ERROR DETECTION
COMPARATOR
REFERENCE
180kΩ
60kΩ
SPX2954
5V
2
SENSE
6
5V TAP
5
ERROR
4
GROUND
330kΩ
+
1μ F
.
.
TO
CMOS OR
TTL
SPX2954 Block Diagram, 8-Lead 5V Version
Typical Performance Characteristics
1.8
1.6
1.4
1.2
1.0
0.8
0.6
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (˚C)
Shutdown Threshold Voltage
5
4
2
0
-2
~~~
1
1.25W
0
-1
0
10 20
30
40
50
TIME (µs)
Thermal Response
3.5
3.0
2.5
CL = 220µF
2.0
CL = 3.3µF
1.5
CBYP = 0.1µF
IL = 100mA
CL = 1µF
1.0
0.5
0.0
10 2
10 3
10 4
10 5
FREQUENCY (Hz), CBYP=0.1uF
Output Noise
30
25
20
15
10
5
0
~
~
10
5
0
-5
-10
5
TJ = 150 ºC
IL = 100µA
IL = 1mA
TJ = 125 ºC
IL = 100µA
10
15
20
25
30
INPUT VOLTAGE (V)
Line Regulation
REV1A
80
IL = 50mA
70
60
IL = 100mA
50
40
CL = 1μF
VIN = 6V
30
VOUT = 5V
20
10
101
10 2
10 3
10 4
FREQUENCY (Hz)
Ripple Rejection
10 5
10 6
5/15
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