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LM2931 Datasheet(PDF) 10 Page - ON Semiconductor

Part No. LM2931
Description  100 mA, Adjustable Output, LDO Voltage Regulator with 60 V Load Dump Protection
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LM2931 Datasheet(HTML) 10 Page - ON Semiconductor

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LM2931, NCV2931 Series
http://onsemi.com
10
0.20
0.30
0.00
Figure 22. Output Noise Voltage vs.
Output Capacitor Impedance
Figure 23. Output Capacitor ESR Stability vs.
Output Load Current
OUTPUT CURRENT (mA)
10
50
90
100
0.50
0.60
Note − Optimum stability uses a 22
mF
output capacitor. Output capacitor values
below 10
mF are not recommended.
Unstable
Stable
0.1
1.0
0.01
|ZO|, MAGNITUDE OF CAPACITOR IMPEDANCE (mW)
10
100
1.0 k
10 k
10
100
Vin = 5.6 V
Vout = 5.0 V
IO = 100 mA
Vnrms 10 Hz to 10 MHz
|ZO| @ 40 kHz
TA = 25°C
Unstable
Marginally
Stable
Stable
0
0.10
0.40
20
60
30
70
40
80
22
mF
10
mF
47
mF
100
mF
40
50
60
70
80
90
100
0
0.4
0.8
1.2
1.6
2.0
2.4
010
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
PD(max) for TA = 50°C
Minimum
Size Pad
L
L
Free Air
Mounted
Vertically
30
50
70
90
110
130
150
0.4
0.8
1.2
1.6
2.0
2.4
2.8
020
30
50
40
10
L, LENGTH OF COPPER (mm)
170
3.2
RqJA
2.0 oz.
Copper
Graph represents symmetrical layout
3.0 mm
L
L
RqJA
2.0 oz. Copper
Figure 24. SOP−8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Figure 25. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
PD(max) for TA = 50°C


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