BD9122GUL_09 Datasheet, PDF (4/14 Pages) Rohm – Output 0.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9122GUL
●Characteristics data(Reference data) – Continued
1.55
1.54
【VOUT=1.5V】
VCC=3.3V
1.53 _Io=0A
1.52
1.51
1.50
1.49
1.48
1.47
1.46
1.45
-25 -15 -5 5 15 25 35 45 55 65 75 85
TEMPERATURE:Ta[℃]
Fig. 7 Ta - VOUT
100
90 ^{【VOUT=1.5V】}
80
70
60
50
40
30
20
10
VCC=3.3V
Ta=25℃
0
1
10
100
1000
OUTPUT CURRENT:IOUT[mA]
Fig.8 Efficiency
0.35
VCC=3.3V
0.30
0.25
0.20
PMOS
0.15
NMOS
0.10
0.05
0.00
-25 -15 -5 5 15 25 35 45 55 65 75 85
TEMPERATURE:Ta [℃]
Fig.10 Ta – RONN, RONP
2.0
1.8 ^VCC=3.3V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-25 -15 -5 5 15 25 35 45 55 65 75 85
TEMPERATURE:Ta[℃]
Fig.11 Ta - VEN
Technical Note
1.20
1.15
1.10
1.05
VCC=3.3V
1.00
0.95
0.90
0.85
0.80
-25 -15 -5 5 15 25 35 45 55 65 75 85
TEMPERATURE:Ta[℃]
Fig.9 Ta - Fosc
400
370 ^VCC=3.3V
340
310
280
250
220
190
160
130
100
-25 -15 -5 5 15 25 35 45 55 65 75 85
TEMPERATURE:Ta[℃]
Fig.12 Ta - Icc
1.2
Ta=25℃
1.1
1
0.9
0.8
2.5
4
INPUT VOLTAGE:VCC[V]
Fig.13 Vcc - Fosc
VCC=PVCC
=EN
【VOUT=1.5V】
【SLLM^TM control
SW
VOUT=1.5V】
VOUT
5.5
VCC=3.3V
Ta=25℃
Io=0A
VOUT
VCC=3.3V
Ta=25℃
Fig.14 Soft start waveform
Fig.15 SW waveform Io=10mA
【PWM control
SW
VOUT=1.5V】
VOUT
【VOUT=1.8V】
VOUT
【VOUT=1.8V】
VOUT
VCC=3.3V
IOUT
Ta=25℃
VCC=3.3V
Ta=25℃
Fig.16 SW waveform Io=200mA
Fig.17 Transient Response
Io=50→125mA(10μs)
IOUT
VCC=3.3V
Ta=25℃
Fig.18 Transient Response
o=125→50mA(10μs)
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4/13
2009.05 - Rev.A