BD9859EFJ Datasheet, PDF (6/16 Pages) Rohm – Simple Step-down Switching Regulators with Built-in Power MOSFET

BD9859EFJ
Technical Note
6.0
5.0
4.0
3.0
VCC=14V
2.0
VCC=12V
VCC=7V
1.0
0.0
-60 -40 -20 0 20 40 60 80 100
Temp (°C)
100
80
Ta=85℃ Ta=25℃
60
40
Ta=-40℃
20
0
0
200
400
600
800
1000
ILx[mA]
Fig.12. Soft Start Time Temperature
Characteristics
Fig.13. Nch FET ON Resistance
Temperature Characteristics
360
Temp=-40°C
300
Temp=25°C
240
Temp=85°C
180
120
60
0
0
2
4
6
8
10
12
V_LX (V)
Fig.14. Pre-charge FET ON Resistance
Temperature Characteristics
12.0
10.0
8.0
VCC=12V
VCC=14V
6.0
VCC=8V
4.0
2.0
0.0
-60 -40 -20 0 20 40 60 80 100
Temp (°C)
Fig.15 OCP Detect Current
Temperature Characteristics
2.4
2.0
1.6
1.2
0.8
0.4
0.0
-60 -40 -20 0
20 40 60 80 100
Temp (°C)
Fig.16. EN Threshold Temperature
Characteristics
12.0
10.0
8.0
6.0
4.0
2.0
0.0
-60 -40 -20 0 20 40 60 80 100
Temp (°C)
Fig.17. EN Pin Influx Current
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6/15
2010.02 - Rev.A