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| BU90002GWZ_11 Datasheet, PDF (7/14 Pages) Rohm – Output 1.0A High-efficiency Step-down Switching regulators with Built-in Power MOSFET | |||
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BU90002GWZ, BU90003GWZ, BU90004GWZ, BU90005GWZ, BU90006GWZ
âElectrical characteristic curves (Reference data)
BU90004GWZ(1.80V OUTPUT)
Technical Note
EN
5V/div
VOUT
1V/div
IL
200mA/div
40us
Fig.24 Start up
EN
5V/div
VOUT
1V/div
100us
Fig.25 Shut down
Vout
50mV/div
ac coupled
Vout
50mV/div
ac coupled
4us
4us
IOUT
200mA/div
IOUT
200mA/div
Fig. 26 Load transient response 5mA to 200mA
tr=tf=100ns, Mode :Low
Fig.27 Load transient response 50mA to 350mA
tr=tf=100ns, Mode :Low
Vout
50mV/div
ac coupled
IOUT
200mA/div
4us
Vout
50mV/div
ac coupled
LX
2V/div
400ns
Fig.28 Load transient response 200mA to 600mA
tr=tf=100ns, Mode :Low
Fig.29 PFM mode Operation Iout=50mA
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© 2011 ROHM Co., Ltd. All rights reserved.
7/14
Target spec. ver.1.7
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