BD9778F-TR View Datasheet(PDF) - ROHM Semiconductor
Part Name
Description
Manufacturer
BD9778F-TR Datasheet PDF : 17 Pages
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BD9778F, BD9778HFP, BD9001F, BD9781HFP
Technical Note
1.8
1.6
1.4
1.2
1.0
0.8
Ta=125Ŋ
0.6
Ta=25Ŋ
0.4
Ta=-40Ŋ
0.2
0.0
0.0 0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT : IO[A]
Fig.13 ON resistance VIN=7V (BD9778F/HFP)
1.8
1.6
1.4
1.2
1.0
0.8
Ta=125Ŋ
0.6
Ta=25Ŋ
0.4
Ta=-40Ŋ
0.2
0.0
0.0
0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT : IO[A]
Fig.14 ON resistance VIN=13.2V (BD9778F/HFP)
1.8
1.6
1.4
1.2
1.0
0.8
Ta=125Ŋ
0.6
Ta=25Ŋ
0.4
Ta=–40Ŋ
0.2
0.0
0
0.5
1
1.5
2 2.5
OUTPUT CURRENT : IO[A]
Fig.15 ON resistance VIN=7V (BD9001F)
1.8
1.6
1.4
1.2
1.0
Ta=125Ŋ
0.8
0.6
0.4
0.2
0.0
0
Ta=25Ŋ
Ta=–40Ŋ
0.5
1
1.5
2 2.5
OUTPUT CURRENT : IO[A]
Fig.16 ON resistance VIN=13.2V
(BD9001F)
100
90
5V output
80
70
3.3V output
2.5V output
60
50
40
30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT : IO[A]
Fig.17 IO vs Efficiency(VIN=12V,f=200kHz)
ý(BD9781HFP)
100
5V output 3.3V output
90
80
70
60
2.5V output
50
1.5V output
40
30
20
10
0
0
0.5
1.0
1.5
2.0
OUTPUT CURRENT : IO[A]
Fig.18 IO vs Efficiency(VIN=12V,f=100kHz)
ý(BD9778F/HFP)
100
6
6
90
5V output
Ta=25Ŋ Ta=-40Ŋ
Ta=25Ŋ
Ta=-40Ŋ
80
5
5
70
3.3V output
60
2.5V output
4
Ta=125Ŋ
4
Ta=125Ŋ
50
3
3
40
30
2
2
20
10
1
1
0
0
0.4 0.8 1.2 1.6
2
OUTPUT CURRENT : IO[A]
0
01 2 34 5 67
OUTPUT CURRENT : IO[A]
0
0
1
2
3
4
5
OUTPUT CURRENT : IO[A]
Fig.19 IO vs Efficiency(VIN=12V,f=100kHz) Fig.20 Current capacitance(VIN=12V,Vo=5V,f=100kHz) Fig.21 Current capacitance(VIN=12V,Vo=5V,f=100kHz)
ý(BD9001F)
(BD9781HFP)
(BD9778F/HFP)
6
Ta=25Ŋ
Ta=-40Ŋ
5
4
Ta=125Ŋ
3
2
1
0
0
1
2
3
4
5
OUTPUT CURRENT : IO[A]
Fig.22 Current capacitance(VIN=12V,Vo=5V,f=100kHz)
(BD9001F)
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5/16
2010.02 - Rev. B
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