BD9870FPS_09 ROHM [Rohm], BD9870FPS_09 Datasheet - Page 8

• Manufacturer Part Number: BD9870FPS_09
• Description: Simple Step-down Switching Regulator with Built-in Power MOSFET
• Manufacturer: ROHM [Rohm]

BD9870FPS
© 2009 ROHM Co., Ltd. All rights reserved.
www.rohm.com
Fig.11 Driver Drain-Source Voltage vs. Output Current
3.0
2.5
2.0
1.5
1.0
0.5
0.0
7
6
5
4
3
2
1
0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
0.0
0.0
Fig.15 Over Current Protection Characteristics
Fig.13 Output Voltage vs. Supply Voltage
0.5
10
0.5
Output Current[A]
1.0
Input Voltage[V]
Load Current[A]
20
1.5
1.0
Ro=50 Ω
2.0
VCC=8V
VCC=12V
VCC=35V
1.5
30
2.5
2.0
3.0
40
8/11
100
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
90
80
70
60
50
40
30
20
10
0
0
0
Fig.14 Output Voltage vs. Load Current
Fig.12 Efficiency vs. Load Current
Fig.16 Output Start-up Characteristics
500
STBY 0 → 3V
1V/div
VCC=35V
Load Current[mA]
500
Vo
2V/div
VCC=8V
Load Current[mA]
VCC=12V
VCC=24V
VCC=12V
VCC=8V
1000
Ta=25 ℃
Ro=5Ω
L:C10-H5R(MITSUMI)
1000
Technical Note
2009.05 - Rev.A
1500
1500
2000