LM2931ACTH 查看數據表（PDF） - ON Semiconductor
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LM2931ACTH
ON Semiconductor
LM2931ACTH Datasheet PDF : 23 Pages
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LM2931, NCV2931 Series
100
Vin = 5.6 V
Vout = 5.0 V
IO = 100 mA
10 Vnrms 10 Hz to 10 MHz
|ZO| @ 40 kHz
TA = 25°C
1.0
Unstable
Marginally
Stable
0.1
Stable
0.01
10
100
1.0 k
10 k
|ZO|, MAGNITUDE OF CAPACITOR IMPEDANCE (mW)
Figure 22. Output Noise Voltage vs.
Output Capacitor Impedance
0.60
10 mF
0.50 22 mF
47 mF
0.40 100 mF
Unstable
0.30
0.20
0.10
0.00
0
Stable
Note - Optimum stability uses a 22 mF
output capacitor. Output capacitor values
below 10 mF are not recommended.
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
Figure 23. Output Capacitor ESR Stability vs.
Output Load Current
170
3.2
150
PD(max) for TA = 50°C
2.8
130
2.4
110
90
70
Graph represents symmetrical layout 2.0
ÎÎÎÎÎÎÎ L
2.0 oz.
Copper
1.6
ÎÎÎÎÎÎÎ1.2
L
3.0 mm
50
0.8
RqJA
30
0.4
0
10
20
30
40
50
L, LENGTH OF COPPER (mm)
Figure 24. SOP−8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
100
Free Air
90
Mounted
Vertically
80
Minimum
70
Size Pad
60
2.4
PD(max) for TA = 50°C
2.0
2.0 oz. Copper
L
1.6
ÎÎÎÎÎÎÎÎ L
1.2
ÎÎÎÎÎÎÎÎ0.8
50
0.4
RqJA
40
0
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
Figure 25. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
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