BD9329AEFJ Datasheet, PDF (3/16 Pages) Rohm – Simple Step-down Switching Regulator with Built-in Power MOSFET

BD9329AEFJ
●Block Diagram
EN
VIN
VREF
OSC
5V
VREG
FB
COMP
IBIAS
UVLO
TSD
+
-^{+ ERR}
SLOPE
SS
Soft Start
OCP
S
LVS
DRV
+
PWM
－
LOGIC
R
LVS
GND
Fig.1 Block Diagram
Technical Note
BST
12V
VIN
SW
OUTPUT
●Typical Application Circuit
C_SS
0.1+0.05
μF
C_PC
3300pF
R_PC
7.5kΩ
R_DW
10kΩ
R_UP
27kΩ
Thermal Pad
(to be shorted to GND)
VIN 12V
C_VC1
10μF
L
10µH
VOUT 3.3V
C_CO1
20μF
Input capacitor
Output capacitor
Inductor
Symbol
C_VC1
C_CO1
L
※R_BS protect from VIN-BST short destruction.
Fig.2 Application Circuit
TDK
TDK
TDK
Maker
Part No
C3225JB1E106K
C3216JB1C106M
SLF10165-100M3R8
10µF/25V
10µF/16V
10µH/3.8A
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© 2011 ROHM Co., Ltd. All rights reserved.
3/15
2011.02 - Rev.A