BD91361MUV Datasheet, PDF (5/18 Pages) Rohm – Output 2A More High-efficiency Step-down Switching Regulator with Built-in Power MOS FET

BD91361MUV
Technical Note
1.1
【SLLM^TM control
VOUT=1.2V】
【VOUT=1.2V】
VCC=PVCC
1
=EN
SW
0.9
0.8
0.7
2.7
Ta=25℃
VOUT
3.4
4.1
4.8
5.5
INPUT VOLTAGE:VCC[V]
Fig.12 Power supply voltage-
Operating frequency
VCC=5V
Ta=25℃
Io=0A
Fig.13 Soft start waveform
VOUT
VCC=5V
Ta=25℃
Fig.14 SW waveform Io=0mA
【PWM control
VOUT=1.2V】
【VOUT=1.2V】
【VOUT=1.2V】
SW
VOUT
VOUT
IOUT
VCC=5V
Ta=25℃
VCC=5V
Ta=25℃
Fig.15 SW waveform Io=4A
Fig. 16 Transient Response
Io=1A→4A(20µs)
VCC=5V
IOUT
Ta=25℃
Fig.17 Transient Response
Io=4A→1A(20µs)
【VOUT=1.2V】
VID[1:0]=(0,0)→(1,1)
【VOUT=1.2V】
VID[1:0]=(1,1)→(0,0)
1.2V
1.44V
Fig.18 Change Response
1.44V
1.2V
Fig.19 Change Response
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5/17
2010.06 - Rev.A