BD9139MUV Datasheet, PDF (4/17 Pages) Rohm – Output 2A or More High-efficiency Step-down Switching Regulators with Built-in Power MOSFET

BD9139MUV
Technical Note
●Electrical characteristic curves 【BD9139MUV】– Continued
1.1
【VOUT=3.3V】
1
VCC=PVCC
=EN
0.9
【SLLM
VOUT=3.3V】
0.8
0.7
2.7
Ta=25℃
3.4
4.1
4.8
5.5
INPUT VOLTAGE:VCC[V]
Fig.12 Vcc - Fosc
VOUT
VCC=5V
Ta=25℃
Io=0A
Fig.13 Soft start waveform
VCC=5V
Ta=25℃
Fig.14 SW waveform Io=10mA
【PWM
SW
VOUT=3.3V】
【VOUT=1.2V】
VOUT
【VOUT=1.2V】
VOUT
VOUT
IOUT
VCC=5V
Ta=25℃
Fig.15 SW waveform Io=3A
IOUT
VCC=5V
Ta=25℃
Fig. 16 Transient Response
Io=1→3A(10μs)
VCC=5V
Ta=25℃
Fig.17 Transient Response
Io=3→1A(10μs)
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4/16
2009.05 - Rev.A