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© 2020 ROHM Co., Ltd.
No. 63UG041E Rev.001
AUG.2020
User’s Guide
BD9B304QWZ-EVK-001
Operation State Settings
Below is a table of BD9B304QWZ condition selectable using EN pin via SW_EN switch.
Table 1. EN Pin Settings
SW_EN switch
EN Pin
BD9B304QWZ Condition
H
VIN
Enable
L
GND
Shutdown
Operation Mode Settings
Below is a table of BD9B304QWZ operation modes selectable using MODE pin via SW_MODE switch.
Table 2. MODE Pin Settings
SW_MODE switch
MODE Pin
BD9B304QWZ Operation Mode
H
VCC
Forced PWM
L
GND
Automatic switching between Deep-SLLM and PWM
Parts list
Table 3. Parts list
Part No
Value
Manufacturer
Model number
Size [Unit: mm(inch)]
IC
U1
-
ROHM
BD9B304QWZ
2.00 x 2.00
Inductor
L1
1.0µH
MURATA
FDSD0420-H-1R0M
4.20 x 4.20
Capacitor
C1
0.1μF
MURATA
GRM188B31H104MA92D
1608(0603)
C2
10μF
MURATA
GRM21BB31A106ME18
2012(0805)
C3
No mount
-
-
-
C5, C6
22μF
MURATA
GRM21BR61C226ME44
2012(0805)
C7
No mount
-
-
-
C8
0.1μF
MURATA
GRM188B31H104MA92D
1608(0603)
C9
No mount
-
-
-
C10
150pF
MURATA
GCM1882C1H151JA01
1608(0603)
Resistor
R0
0Ω
ROHM
MCR03 Series
1608(0603)
R1
150kΩ
ROHM
MCR03 Series
1608(0603)
R2
75kΩ
ROHM
MCR03 Series
1608(0603)
R3
No mount
-
-
-
R5
0Ω
ROHM
MCR03 Series
1608(0603)
Switch
SW_EN, SW_MODE
3 Points
-
-
-
Contact pin
GND, GND_S, VOUT,
VOUT_S, EN, MODE,
VIN, VIN_S
Test pins
-
-
-
