BU90002GWZ_11 Datasheet, PDF (6/14 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) – Continued
BU90003GWZ(1.2V OUTPUT)
Technical Note
Vout
50mV/div
ac coupled
80ns
LX
2V/div
IL
500mA/div
Fig.19 PWM mode Operation Iout=100mA
MODE
2V/div
Vout
50mV/div
ac coupled
LX
200mA/div
2us
Fig.20 Mode Change Response
MODE High to Low
2us
MODE
2V/div
Vout
50mV/div
ac coupled
LX
200mA/div
Fig.21 Mode Change Response
MODE Low to High
100
90
80
70
60
50
40
30
20
10
0
0.1
VIN=2.7V
VIN=3.6V
VIN=4.2V
1
10
100
1000
Load current[mA]
Fig.22 Efficiency vs Load current
VIN=3.6V PWM/PFM Auto Mode
1.224
1.212
1.2
1.188
1.176
1
VIN=2.7V
VIN=3.6V
VIN=4.2V
10
100
Iout[mA]
Fig.23 Load regulation
PWM/PFM Auto mode
1000
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Target spec. ver.1.7