BD9122GUL_09 Datasheet, PDF (3/14 Pages) Rohm – Output 0.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9122GUL
●Pin configuration
Technical Note
9122
Lot No.
SW B1
PVcc B2
Vcc B3
A1 PGND
A2 GND
A3 EN
(unit : mm)
ADJ B4
A4 ITH
TOP View
Fig.2 TOP View
Fig.3 Physical Dimension : VCSP50L2
●Pin number and function
Pin No.
Pin name
A1
PGND
A2
GND
A3
EN
A4
ITH
B1
SW
B2
PVCC
B3
VCC
B4
ADJ
Pin function
Nch FET source pin
Ground
Enable pin（Active High）
Gm Amp output pin/Connected phase compensation capacitor
Pch/Nch FET drain output pin
Pch FET source pin
Vcc power supply input pin
Output voltage detect pin
●Characteristics data(Reference data)
2.0
【VOUT=1.5V】
Ta=25℃
Io=0A
1.5
1.0
0.5
0.0
0
1
2
3
4
5
INPUT VOLTAGE:VCC[V]
Fig.4 Vcc - VOUT
2.0
【VOUT=1.5V】
1.5
1.0
0.5
0.0
0
VCC=3.3V
Ta=25℃
Io=0A
1
2
3
4
5
EN VOLTAGE:VEN[V]
Fig.5 VEN - VOUT
2.0
【VOUT=1.5V】
1.5
1.0
0.5
0.0
0
VCC=3.3V
Ta=25℃
1
2
3
OUTPUT CURRENT:IOUT[A]
Fig.6 IOUT - VOUT
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3/13
2009.05 - Rev.A