BU90002GWZ_11 Datasheet, PDF (4/14 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
BU90002GWZ（3.3V OUTPUT）
Vout
20mV/div
ac coupled
LX
5V/div
IL
500mA/div
MODE
1V/div
80ns
Vout
20mV/div
ac coupled
LX
500mA/div
Technical Note
4us
Fig.7 PFM mode Operation
Iout=100mA
Fig.8 Mode Change Response
MODE High to Low
4us
MODE
2V/div
Vout
20mV/div
ac coupled
LX
500mA/div
Fig.9 Mode Change Response
MODE Low to High
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
0
200
400
600
800
1000
Load current[mA]
Fig.11 Load regulation
VIN=5V PWM/PFM Auto mode
100
95
90
85
80
75
70
65
60
1
10
100
1000
Load current[mA]
Fig.10 Efficiency vs Load current
VIN=5V PWM/PFM Auto Mode
30
25
20
15
10
5
0
0
200 400 600 800 1000
Load current[mA]
Fig.12 Vout Ripple Voltage
VIN=5V PWM/PFM Auto Mode
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Target spec. ver.1.7