spx3940am3-l-5-0-tr Exar Corporation, spx3940am3-l-5-0-tr Datasheet - Page 3

• Manufacturer Part Number: spx3940am3-l-5-0-tr
• Description: 1.0a Low Dropout Voltage Regulator
• Manufacturer: Exar Corporation

Date: 4/14/06 Rev A
Figure 4. Ground Current vs Load Current
Figure 2. Line Regulation
3.320
3.315
3.310
3.305
3.300
3.295
3.290
3.285
3.280
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0
4
IN
0.25
6
Ibias
0.5
8
V
Reference
IN
0.75
10
(V)
1.240V
12
1
3.3V Device
IL = 10mA
CL = 10µF
+
-
3.3V Device
V
CL = 10µF
1.25
14
IN
SPX3940 1A Low Dropout Voltage Regulator
= 4.3V
16
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown
Thermal
1.5
3
Figure 5. Ground Current vs Input Voltage
Figure 3. Load Regulation
100
3.310
3.305
3.300
3.295
3.290
3.285
3.280
95
90
85
80
75
70
-40
28V
O.V
I
LIMIT
0
-20
0.25
0
20
0.5
V
© Copyright 2006 Sipex Corporation
40
BLOCK DIAGRAM
R1
R2
IN
(V)
0.75
60
IL (A)
OUT
GND
1
80
3.3V Device
IL = 10 mA
CL = 10µF
3.3V Device
IL=4.3mA
CL=10µF
100
1.25
120
1.5