BD9870FPS_09 Datasheet, PDF (7/12 Pages) Rohm – Simple Step-down Switching Regulator with Built-in Power MOSFET

BD9870FPS
Technical Note
●Typical Performance Characteristics（Unless otherwise noted, Ta=25℃,Vcc=12V,Vo=5V,STBY=3V）
10
9
8
7
6
5
4
3
2
1
0
0
Io=0m A
10
20
30
40
Input Voltage[V]
Fig.5 Circuit Current vs. Supply Voltage：no load
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-40
STBY=0V
VCC=8V
VCC=12V
VCC=24V
VCC=35V
-15
10
35
60
85
Ambient Temperature[℃]
Fig.6 Stand-by Current vs. Ambient temperature
1100
1050
1000
950
900
850
800
750
700
0
10
20
30
40
Input Voltage[V]
1100
1050
1000
950
900
850
800
750
700
-40
-15
10
35
60
85
Am bient Tem perature[℃]
Fig.7 Oscillator Frequency vs. Supply Voltage
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
5
10 15 20 25 30 35 40
Input Voltage[V]
Fig.9 ErrorAmp Threshold Voltage vs. Supply Voltage
Fig.8 Oscillator Frequency vs. Supply Voltage
7
6
5
4
3
2
1
0
0.0
1.0
2.0
3.0
STBY Input Voltage[V]
Fig.10 Output Voltage vs. STBY Pin Voltage
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7/11
2009.05 - Rev.A