BU90002GWZ_11 Datasheet, PDF (3/14 Pages) Rohm – Output 1.0A High-efficiency Step-down Switching regulators with Built-in Power MOSFET

BU90002GWZ, BU90003GWZ, BU90004GWZ, BU90005GWZ, BU90006GWZ
●Electrical characteristic curves (Reference data)
L:LQM21MPN1R0NG0 (2.0mm×1.6mm×1.0mm Murata)
COUT:GRM155R60J475M(1.0mm×0.5mm×0.5mm Murata)
BU90002GWZ（3.3V OUTPUT）
EN
2V/div
VOUT
2V/div
IL
500mA/div
EN
2V/div
VOUT
1V/div
20us
Technical Note
100us
Fig.1 Start up
Fig.2 Shut down
Vout
50mV/div
ac coupled
Vout
50mV/div
ac coupled
IOUT
50mA/div
10us
4us
IOUT
200mA/div
Fig.3 Load transient response 5mA to 50mA
tr=tf=100ns, Mode :Low
Fig.4 Load transient response 50mA to 350mA
tr=tf=100ns, Mode :Low
Vout
50mV/div
ac coupled
IOUT
200mA/div
Vout
20mV/div
ac coupled
4us
LX
5V/div
IL
500mA/div
Fig.5 Load transient response 150mA to 500mA
tr=tf=100ns, Mode :High
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3/14
400ns
Fig.6 PFM mode Operation
Iout=40mA
Target spec. ver.1.7