BD9528AMUV Datasheet, PDF (24/30 Pages) Rohm – High Performance Regulators for PCs Main Power Supply for Notebook PCs(With Built-in Linear Regulator)

BD9528AMUV
●Evaluation Board Circuit (Vo1=5V/8A, f1=300kHz Vo2=3.3V/8A f2=300kHz)
VIN
CTL
REG1
EN1
REG1
EN2
VIN
12V
R1
CTL _C1
EN1
EN2
REG1
5V
C2
REG2
3.3V
C3
C4
C5
C6
R5
R6
R7
R8
MCTL1
MCTL2
BD9528AMUV
30 _VIN
9 _CTL
BOOT1 ^{22 R9}
HG1 ^{23 R10}
C7
21 _EN1
SW1 ²⁴
4 _EN2
29 _REG1
28 _REG2
LG1 ^{26 R11}
PGND1 ²⁵
FB1 ¹⁴
VIN VIN
C30
Q2
C9
SW1
D1
Q1
12 _REF
19 _SS1
6 SS2
17 _ILIM1
8 _ILIM2
15 _FS1
10 _FS2
18 _MCTL1
Vo1 ²⁷
R12
BOOT2 ³
R13
C8
HG2 ²
SW2 ¹
R14
LG2 ³¹
PGND2 ³²
FB2 ¹¹
VIN VIN
Q4
C31 C12
SW2
Q3
D2
Vo2 ⁷
PGOOD1 ²⁰
PGOOD2 ⁵
REG1 PGOOD1
R15
REG1 PGOOD2
R16
L1
R17
R18
L2
R19
R20
16 _{MCTL2 AGND}
13
Analog Ground
Power Ground
Technical Note
VO1
C14
VO2
C18
DESIGNATION
R1
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
C1
C2
C3
RATING
0Ω
68kΩ
68kΩ
75kΩ
75kΩ
0Ω
0Ω
0Ω
0Ω
0Ω
0Ω
100kΩ
100kΩ
56kΩ
9.1kΩ
30kΩ
8.2kΩ
10uF(25V)
10uF(10V)
10uF(6.3V)
PART No.
-
MCR03
MCR03
MCR03
MCR03
-
-
-
-
-
-
MCR03
MCR03
MCR03
MCR03
MCR03
MCR03
GRM31CB31E106KA75
GRM21BB10J106KD
GRM21BB10J106KD
COMPANY
-
ROHM
ROHM
ROHM
ROHM
-
-
-
-
-
-
ROHM
ROHM
ROHM
ROHM
ROHM
ROHM
MURATA
MURATA
MURATA
DESIGNATION
C4
C5
C6
C7
C8
C9
C12
C14
C18
C30
C31
(D1)
(D2)
L1
L2
Q1
Q2
Q3
Q4
U1
RATING
0.1uF(6.3V)
2200pF
2200pF
0.47uF
0.47uF
10uF(25V)
10uF(25V)
330uF
330uF
1000pF
1000pF
(Diode)
(Diode)
2.2uH
2.2uH
FET
FET
FET
FET
-
PART No.
GRM21BB10J104KD
GRM188B11H102KD
GRM188B11H102KD
GRM188B11A474KD
GRM188B11A474KD
GRM31CB31E106KA75
GRM31CB31E106KA75
6TPE330MI
6TPE330MI
GRM1882C1H102JA01
GRM1882C1H102JA01
(RSX501L-20)
(RSX501L-20)
FDVE1040-2R2M
FDVE1040-2R2M
RMW130N03
RMW130N03
RMW130N03
RMW130N03
BD9528AMUV
COMPANY
MURATA
MURATA
MURATA
MURATA
MURATA
MURATA
MURATA
SANYO
SANYO
MURATA
MURATA
(ROHM)
(ROHM)
TOKO
TOKO
ROHM
ROHM
ROHM
ROHM
ROHM
note) Without any value of ripple(about 10mV), there is a possibility of FB signal not acting stable switching due to the
adoption of comparator control method. Please use in condition with enough ripple voltage either by ①reducing the
L-value of coil, or ②using big output capacitor of ESR. Ripple voltage can be generated in FB terminal by adding
capacitor in parallel to resistor (R17, R19) of FB terminal, but because it becomes delicate to noise from output
(Vo1/Vo2) line it is not recommended. Also condition of stable action gets effected by layout of board, etc., so please
give full attention.
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2011.11 - Rev.A